How To Install Derby Plugin In Eclipse

Eclipse for Java

How To Install Eclipse and Get Started with Java Programming
(on Windows, macOS and Ubuntu)

Eclipse (@ www.eclipse.org) is an open-source Integrated Development Environment (IDE) supported by IBM. Eclipse is popular for Java application development (Java SE and Java EE) and Android apps. It also supports C/C++, PHP, Python, Perl, and other web projection developments via extensible plug-ins. Eclipse is cantankerous-platform and runs under Windows, Linux and macOS.

Eclipse Versions

The various versions are:

• Eclipse i.0 (Nov vii, 2001): based on an before Java IDE called VisualAge from IBM.
• Eclipse 2.0 (June 28, 2002)
• Eclipse two.1 (March 28, 2003)
• Eclipse 3.0 (June 25, 2004)
• Eclipse three.1 (June 28, 2005)
• Eclipse 3.2 (June xxx, 2006) (Callisto - named later on i of the Jupiter's Galilean moons): started annual simultaneous release of all the related Eclipse projects.
• Eclipse iii.3 (June 25, 2007) (Europa - named after another Jupiter's Galilean moons)
• Eclipse 3.four (June 19, 2008) (Ganymede - named after yet some other Jupiter's Galilean moons)
• Eclipse three.5 (June 12, 2009) (Galileo - named subsequently the great 17th century scientist and astronomer Galileo Galilei)
• Eclipse three.6 (June 23, 2022) (Helios - named after god of the sunday in Greek Mythology)
• Eclipse iii.7 (June 23, 2011) (Indigo)
• Eclipse 4.two (June 27, 2022) (Juno)
• Eclipse 4.iii (June 2022) (Kepler)
• Eclipse 4.4 (June 2022) (Luna)
• Eclipse 4.5 (June 2022) (Mars)
• Eclipse 4.6 (June 2022) (Neon)
• Eclipse 4.7 (June 2022) (Oxygen)
• Eclipse 4.8 (June 2022) (Photon)
• Eclipse 2022-09 (4.9) (starting quarterly release), Eclipse 2022-12 (4.x)
• Eclipse 2022-03 (four.11), Eclipse 2022-06 (iv.12), Eclipse 2022-09 (4.13), Eclipse 2022-12 (4.fourteen)
• Eclipse 2022-03 (iv.fifteen), Eclipse 2022-06 (4.16), Eclipse 2022-09 (4.17), Eclipse 2022-12 (four.18)
• Eclipse 2022-03 (iv.19), Eclipse 2022-06 (four.20), Eclipse 2022-09 (4.21), Eclipse 2022-12 (4.22)
• Eclipse 2022-03 (iv.23)

How to Install Eclipse IDE 2022-12 for Java Developers

How to Install Eclipse on Windows

Pace 0: Install JDK

To use Eclipse for Java programming, you need to showtime install Java Evolution Kit (JDK). Read "How to Install JDK for Windows".

Step 1: Download

Download Eclipse from https://www.eclipse.org/downloads/packages/. Choose "Eclipse IDE for Java Developers" and "Windows x86_64" (e.g., "eclipse-coffee-2021-12-R-win32-x86_64.null" - about 313MB) ⇒ Download.

Step two: Unzip

To install Eclipse, but unzip the downloaded file into a directory of your option (e.thousand., "c:\myProject").

I prefer the zip version, because in that location is no need to run any installer. Moreover, y'all can merely delete the unabridged Eclipse directory when it is no longer needed (without running whatever un-installer). You are costless to move or rename the directory. Y'all can install (unzip) multiple copies of Eclipse in the same machine.

How to Install Eclipse on macOS

To use Eclipse for Java programming, you demand to starting time install JDK. Read "How to install JDK for macOS".

To install Eclipse:

1. Goto http://www.eclipse.org/downloads/packet/. Cull "Eclipse IDE for Java Developers" and "macOS x86_64" (for Intel processor). Yous will receive a DMG file (east.grand., "eclipse-java-2021-12-R-macosx-cocoa-x86_64.dmg").
2. Double-click the downloaded Deejay Image (DMG) file. Follow the screen instructions to install Eclipse. Eclipse will be installed under "/Applications/eclipse". (To confirm!)

How to Install Eclipse on Ubuntu Linux

Eclipse comes with many flavors (Run across "Eclipse Packages" @ https://www.eclipse.org/downloads/compare.php):

• To employ Eclipse for Java programming, choose "Eclipse IDE for Java Developers" (JavaSE) or "Eclipse IDE for Java EE Developers" (JavaEE). You lot need to first install JDK. Read "How to install JDK on Ubuntu".
• To use Eclipse for PHP programming, choose "Eclipse IDE for PHP Developers".
• To use Eclipse for C/C++ programming, choose "Eclipse IDE for C/C++ Developers".

Nonetheless, you lot tin can install whatsoever packet, and so add more features when needed.

To install Eclipse (e.thousand, for Java Programming):

1. Download Eclipse from http://world wide web.eclipse.org/downloads/. Nether "Get Eclipse IDE 2022-12" ⇒ Click the link "Download Packages" (instead of pushing the button "Download x86_64"). Choose "Eclipse IDE for Coffee Developers" for Coffee SE program development; or "Eclipse IDE for Java EE Developers" for developing webapps ⇒ Linux x86_64. You will receive a tarball (e.g., "eclipse-java-2020-12-R-linux-gtk-x86_64.tar.gz") in the "~/Downloads" folder.
2. We shall install Eclipse under /usr/local.

                   $              cd /usr/local              $              sudo tar xzvf ~/Downloads/eclipse-java-2020-12-R-linux-gtk-x86_64.tar.gz                  $              cd /usr/bin              $              sudo ln -s /usr/local/eclipse/eclipse               $              ls -ld /usr/bin/eclipse              lrwxrwxrwx ane root root 26 Aug 30 11:53 /usr/bin/eclipse -> /usr/local/eclipse/eclipse $              which eclipse              /usr/bin/eclipse

To run Eclipse, open the "/usr/local/eclipse" folder and click on the "Eclipse" icon; or starting time a "Concluding", enter "eclipse".

Lock Eclipse on Launcher

Simply start Eclipse. Right-click the Eclipse icon ⇒ "Lock to Launcher" or "Add to Favourite".

(For older version - If the above don't work) Create a /usr/share/applications/eclipse.desktop file with the following contents:

[Desktop Entry] Name=Eclipse  Type=Application Exec=eclipse Final=false Icon=/usr/local/eclipse/icon.xpm Annotate=Integrated Development Environment NoDisplay=false Categories=Development;IDE; Proper noun[en]=Eclipse

Offset Eclipse, right-click on the Eclipse icon on launcher ⇒ "Lock to launcher".

Writing your Start Coffee Program in Eclipse

Step 0: Launch Eclipse

1. Launch Eclipse by running "eclipse.exe" from the Eclipse installed directory.
2. Choose an advisable directory for your workspace, i.east., where you would like to save your files (e.grand., c:\myProject\eclipse for Windows) ⇒ Launch.
3. If the "Welcome" screen shows up, shut information technology by clicking the "close" button next to the "Welcome" title.

Pace one: Create a new Java Project

For each Java application, yous need to create a project to keep all the source files, classes and relevant resources.

To create a new Java projection:

1. Choose "File" carte du jour ⇒ "New" ⇒ "Java project" (or "File" ⇒ "New" ⇒ "Project" ⇒ "Coffee project").
2. The "New Coffee Project" dialog pops up.
   1. In "Project proper name", enter "FirstProject".
   2. Check "Use default location".
   3. In "JRE", select "Apply an execution environment JRE (JavaSE-17). Make certain that your JDK is xi and to a higher place.
   4. In "Project Layout", bank check "Use project folder every bit root for sources and class files".
   5. In "Module", UNCHECK "Create module-info.coffee" file.
   Button "Cease" button.
3. IF "Create module-info.coffee" dialog appears, Click "Don't Create".

Step ii: Write a Hello-world Coffee Program

1. In the "Package Explorer" (left pane) ⇒ Right-click on "FirstProject" (or use the "File" carte) ⇒ New ⇒ Class.
2. The "New Java Class" dialog pops up.
   1. In "Source folder", proceed the "FirstProject".
   2. In "Bundle", leave information technology EMPTY. Delete the content if information technology is not empty.
   3. In "Proper name", enter "Howdy".
   4. Bank check "public static void master(Cord[] args)".
   5. Don't change the residuum.
   Push "Cease" button.
3. The source file "How-do-you-do.java" opens on the editor panel (the center pane). Enter the following codes:

   public class Hello {    public static void main(String[] args) {              System.out.println("How-do-you-do, world!");              } }

Step iii: Compile & Execute the Coffee Program

1. At that place is no need to compile the Java source file in Eclipse explicitly. It is because Eclipse performs the so-called incremental compilation, i.eastward., the Java statement is compiled equally and when information technology is entered.
2. To run the program, right-click anywhere on the source file "Hello.java" (or choose "Run" menu) ⇒ Run As ⇒ Java Application.
3. The output "Hello, world!" appears on the Console panel (the bottom pane).

NOTES:

• You should create a NEW Java project for EACH of your Coffee application.
• Nevertheless, Eclipse allows you to keep more than one programs in a project, which is handy for writing toy programs (such every bit your tutorial exercises). To run a item programme, open and correct-click on the source file ⇒ Run Every bit ⇒ Java Awarding.
• Clicking the "Run" push button (with a "Play" icon) runs the recently-run programme (based on the previous configuration). Effort clicking on the "down-arrow" as well the "Run" button.

Correcting Syntax Errors

Eclipse performs incremented compilation, as and when a source "line" is entered. It marked a source line having syntax error with a Red Cross. Place your cursor at the Ruby Cantankerous to view the error message.

Y'all CANNOT RUN the program if there is any syntax error (marked by a RED CROSS before the filename). Correct all the syntax errors; and RUN the program.

HINTS: In some cases, Eclipse shows a Orange Lite-Bulb (for HINTS) next to the Fault Cherry-red-CROSS (Line five in the to a higher place diagram). You tin click on the LIGHT-Bulb to become a list of HINTS to resolve this detail error, which may or may not work!

SYNTAX WARNING: marked by a orange triangular exclaimation sign. Unlike errors, warnings may or may not cause issues. Try to set these warnings besides. But you lot tin RUN your program with warnings.

Read the Eclipse Documentation

At a minimum, you SHOULD browse through Eclipse's "Workbench User Guide" and "Java Development User Guide" - accessible via the Eclipse'south "Welcome" page or "Assistance" menu. This will save you many agonizing hours trying to figure out how to practice somethings afterward.

Debugging Programs in Eclipse

Able to use a graphics debugger to debug programme is crucial in programming. Information technology could save you countless hours guessing on what went wrong.

Step 0: Write a Java Program

The post-obit program computes and prints the factorial of n (=one*2*3*...*n ). The plan, however, has a logical mistake and produce a wrong respond for n =20 ("The Factorial of 20 is -2102132736" - a negative number?!).

ane 2 3 four 5 6 7 8 9 10 xi 12 13 14 fifteen xvi

public class Factorial { public static void main(String[] args) { int n = 20; int factorial = ane; int i = 1; while (i <= due north) { factorial = factorial * i; i++; } System.out.println("The Factorial of " + due north + " is " + factorial); } }

Let's use the graphic debugger to debug the programme.

Step ane: Fix an Initial Breakpoint

A breakpoint suspends program execution for you lot to examine the internal states (east.1000., value of variables) of the program. Before starting the debugger, you need to set at least one breakpoint to suspend the execution within the program. Set a breakpoint at principal() method by double-clicking on the left-margin of the line containing main(). A blue circle appears in the left-margin indicating a breakpoint is set at that line.

Step 2: Start Debugger

Right click anywhere on the source code (or from the "Run" card) ⇒ "Debug As" ⇒ "Coffee Application" ⇒ choose "Yes" to switch into "Debug" perspective (A perspective is a particular organization of panels to suits a sure development task such equally editing or debugging). The program begins execution simply suspends its operation at the breakpoint, i.eastward., the main() method.

As illustrated in the following diagram, the highlighted line (also pointed to by a blue pointer) indicates the statement to be executed in the next step.

Step 3: Step-Over and Watch the Variables and Outputs

Click the "Step Over" button (or select "Footstep Over" from "Run" card) to single-step thru your program. At each of the step, examine the value of the variables (in the "Variable" panel) and the outputs produced past your program (in the "Console" Panel), if any. You can as well identify your cursor at any variable to inspect the content of the variable.

Unmarried-stepping thru the program and watching the values of internal variables and the outputs produced is the ultimate hateful in debugging programs - because it is exactly how the computer runs your program!

Step 4: Breakpoint, Run-To-Line, Resume and Terminate

As mentioned, a breakpoint suspends program execution and allow you examine the internal states of the program. To prepare a breakpoint on a particular statement, double-click the left-margin of that line (or select "Toggle Breakpoint" from "Run" card).

"Resume" continues the program execution, up to the next breakpoint, or till the finish of the programme.

"Single-step" thru a loop with a large count is time-consuming. Yous could set a breakpoint at the statement immediately outside the loop (e.g., Line 11 of the above program), and upshot "Resume" to complete the loop.

Alternatively, you can place the cursor on a particular argument, and issue "Run-To-Line" from the "Run" carte to continue execution up to the line.

"Finish" ends the debugging session. E'er terminate your current debugging session using "Terminate" or "Resume" till the end of the program.

Pace 5: Switching Back to Java perspective

Click the "Coffee" perspective icon on the upper-correct corner to switch dorsum to the "Java" perspective for further programming (or "Window" menu ⇒ Open Perspective ⇒ Coffee).

Important: I can's stress more that mastering the apply of debugger is crucial in programming. Explore the features provided past the debuggers.

Other Debugger's Features

Step-Into and Stride-Render: To debug a method, you lot demand to use "Step-Into" to step into the kickoff statement of the method. ("Step-Over" runs the function in a unmarried step without stepping through the statements within the function.) You could utilise "Footstep-Return" to return back to the caller, anywhere within the method. Alternatively, you lot could set a breakpoint inside a method.

Modify the Value of a Variable: You lot tin alter the value of a variable by entering a new value in the "Variable" panel. This is handy for temporarily modifying the behavior of a program, without changing the source code.

Tips & Tricks

Full general Usages (for all Programming Tasks)

These are the features that I observe to exist about useful in Eclipse:

1. Maximizing Window (Double-Clicking): You tin double-click on the "header" of any console to maximize that particular console, and double-click once more to restore it back. This feature is particularly useful for writing source code in full panel.
2. Shorthand Templates (sysout, for,...): You can blazon "sysout" followed by a ctrl+space (or alt-/) as a shorthand for typing "System.out.println()".
   The default shortcut key (ctrl-space or alt-/) depends on the system. Cheque your system'southward shortcut key setting in "Edit" ⇒ "Content Assist" ⇒ "Default". Accept note that many of you use ctrl+infinite to switch between input languages. Y'all need to reconfigure either your language switching hot-key or Eclipse.
   Similarly, y'all tin type "for" followed by ctrl-space (or alt-/) to get a for-loop.
   You can create your own shorthand in "Window" menu ⇒ "Preferences" ⇒ "Java" ⇒ "Editor" ⇒ "Templates". (Alternatively, in "Window" ⇒ "Preferences" ⇒ blazon "template" as filter text and choose "Coffee" ⇒ "Editor" ⇒ "Templates".)
   Yous can change your key settings in "Window" menu ⇒ "Preferences" ⇒ "General" ⇒ "Primal" ⇒ cull "Command", "Content Assist". (Alternatively, in "Window" ⇒ "Preferences" ⇒ type "key" as filter text and choose "General" ⇒ "Fundamental".)
3. Intelli-Sense (ctrl-space): Y'all can use ctrl-infinite to activate the "intelli-sense" (or content assist). That is, Eclipse will offer you the choices, while you are typing.
4. Source Formatting (ctrl-shift-f): Right-click on the source. Choose "Source" ⇒ "Format" to let Eclipse to layout your source codes with the proper indentation.
5. Source Toggle Comment (ctrl-/): To annotate/uncomment a block of codes, choose "Source" ⇒ "Toggle Comment".
6. Hints for Correcting Syntax Mistake: If there is a syntax fault on a argument, a red marker will evidence up on the left-margin on that statement. You could click on the "light bulb" to display the mistake bulletin, and also select from the available hints for correcting that syntax error.
7. Refactor (or Rename) (alt-shift-r): You lot can rename a variable, method, class, package or even the projection easily in Eclipse. Select and correct-click on the entity to exist renamed ⇒ "Refactor" ⇒ "Rename". Eclipse can rename all the occurrences of the entity.
8. Line Numbers: To show the line numbers, choose "Window" card ⇒ "Preferences" ⇒ "General" ⇒ "Editors" ⇒ "Text Editors" ⇒ Check the "Evidence Line Numbers" Box. You can as well configure many editor options, such as the number of spaces for tab. Alternatively, you can correct-click on the left-margin, and cheque "Bear witness Line Numbers".
9. Error Bulletin Hyperlink: Click on an error bulletin volition hyperlink to the corresponding source statement.
10. Changing Font Type and Size: From "Window" menu ⇒ "Preferences" ⇒ "General" ⇒ "Appearance" ⇒ "Colors and Fonts" ⇒ aggrandize "Java" ⇒ "Java Editor Text Font" ⇒ "Edit". (Alternatively, in "Window" ⇒ "Preferences" ⇒ type "font" as filter text and cull the appropriate entry.)
11. Unicode Support: To enable Unicode support, select "Window" menu ⇒ Preferences ⇒ General ⇒ Workspace ⇒ Text file encoding ⇒ UTF-8. This sets the default character set used for file encoding, similar to VM's command-line option -Dfile.encoding=UTF-8. Unremarkably used charsets for Unicode are UTF-8, UTF-xvi (with BOM), UTF-16BE, UTF-16LE. Other charsets are US-ASCII, ISO-8859-i.
12. Mouse Hover-over: In debug mode, you could configure to testify the variable's value when the mouse hovers over the variable. Select "Window" menu ⇒ "Preferences" ⇒ "Java" ⇒ "Editor" ⇒ "Hover".
13. Comparison Ii Files: In "Package Explorer", select two files (hold the control key) ⇒Right-click ⇒ Compare with.
14. Setting Keyboard Shortcut Keys: You can gear up/modify the keyboard shortcut keys at "Window" ⇒ "Preferences" ⇒ "General" ⇒ "Key".
    I similar to fix the ofttimes-used commands to Ctrl-1 to Ctrl-ten, for examples, "Run Java Application" to "Ctrl-1", etc.
15. Useful Eclipse Shortcut Keys:
    • F3: Goto the declaration of the highlighted variable/method.
    • Ctrl-Shift-G: Search for ALL references of the highlighted variable/method in workspace.
    • Ctrl-One thousand: Search for the Declaration of a variable/method in workspace.
      Don't apply Find (Ctrl-F), but utilize the above context-sensitive search.
    • Ctrl-Shift-F: Format the source lawmaking.
    • Ctrl-Shift-O: Organize imports.
    • Alt-Shift-R: Rename. (Don't use Notice/Supplant.)
    • Ctrl-Space: auto-complete.
16. Parcel Explorer vs. Navigator: Nosotros usually use "Package Explorer" in programming, just it will not show you all the folders and files under the project. On the other manus, "Navigator" is a file director that shows the exact file structure of the projection (like to Windows Explorer). Y'all can enable the Navigator past "Window" ⇒ Bear witness view ⇒ Navigator.
17. Spell Check: To enable spell check, select Window ⇒ Preferences ⇒ type "spell" in the filter ⇒ Full general ⇒ Editors ⇒ Text Editors ⇒ Spelling ⇒ Check "Enable spell checking". Also provide a "User defined dictionary" (with an initially empty text file).
    To correct mis-spell words, right-click and press ctrl-1 (or Edit menu ⇒ Quick Fix).
18. Eclipse's Log File: Goto Assistance ⇒ near Eclipse ⇒ Installation details ⇒ Configuration ⇒ View Error Log.
19. Viewing ii files in split screen: Only click and hold on the title of one file and drag information technology to the lower side of the screen. [To view the same file on split screen, create a new editor window by selecting Window ⇒ New Editor; and elevate i window to the lower side of the screen.]
20. Block Select (Column Select): Push Alt-Shift-A to toggle between block-select mode and normal fashion.
21. Snippets:
    • To view the snippet window: cull "Window" ⇒ Testify View ⇒ Snippets.
    • To create a new snippet category: Right-click ⇒ Customize ⇒ New.
    • To create a new snippet detail: Re-create the desired text ⇒ Select the snippet category ⇒ paste as snippet.
    • To insert a snippet: place the cursor on the desired location at the editor panel ⇒ click the snippet item.
22. Word Wrap (Line Wrap): Word-wrap (or line-wrap) is essential for editing long HTML documents without the horizontal roll bar. Yet, the Eclipse's HTML Editor and Text Editor do non back up word-wrap.
    Yous could install a plug-in called "Word Wrap" from http://ahtik.com/eclipse-update/.
    Cull "Aid" ⇒ Install New Software ⇒ in "Work with" Enter "http://ahtik.com/eclipse-update/".
    To activate discussion wrap, right-click on the editor panel ⇒ select "Give-and-take Wrap".
23. Creating "link binder" in projection: Y'all do not have to place all the folders under the project base of operations directory, instead, you tin can utilise so-called "link folders" to link to folder outside the project base directory.
    To create a link folder in a project, right-click on the project ⇒ File ⇒ New ⇒ Folder ⇒ Advanced ⇒ Cheque Link to alternating Location (Linked Folder).
24. Running Eclipse in "clean" mode: You can run eclipse in so-called "make clean" mode, which wipes all the cached information and re-initialize the cache, by running eclipse from control-line with "-clean" statement (i.e., "eclipse -make clean"). Information technology is useful if something is not working proper, especially if you install a new copy of Eclipse.
25. Show the Right Margin: Window ⇒ Preferences ⇒ General ⇒ Editors ⇒ Text Editors ⇒ Bear witness Impress Margin and set up the cavalcade number.
26. Permit me know if you have more tips to be included hither.

Update Eclipse and Install new Software

1. Install New Software: Select "Help" menu ⇒ Install New Software ⇒ In "Work With", pull downwardly the select menu and choose a software site.
2. Update: Select "Help" menu ⇒ Check for Updates ⇒.

For Java Awarding Development Only

1. Small Toy Java Programs: You can keep many small programs (with main()) in one Java project instead of create a new project for each toy program. To run the desired plan, right-click on the source file ⇒ "Run equally" ⇒ "Java Application".
2. Scanner/printf() and JDK 1.5: If you meet syntax error in using printf() or Scanner (which are available from JDK 1.5), you need to check your compiler settings. Select "Window" carte ⇒ Preferences ⇒ open the "Coffee" node ⇒ select "Compiler" ⇒ in "Compiler compliance level" ⇒ select the latest release, which should be "1.5" or above.
3. Command-Line Arguments: To provide command-line arguments to your Java plan in Eclipse, right-click on the source file ⇒ "Run Configurations" ⇒ Under the "Main" panel, check that "Projection" proper noun and "Main Class" are appropriate ⇒ Select the "Argument" tab ⇒ type your command-line arguments within the "Program Arguments" box ⇒ "Run".
4. Resolving Import (Ctrl-Shift-o): To inquire Eclipse to insert the import statements for classes. Useful when you lot copy a big clamper of codes without the respective import statements.
5. Including Some other Project: To include another projection in the same piece of work space, right-click on the project ⇒ Build Path ⇒ Configure Build Path... ⇒ Select "Projects" tab ⇒ "Add..." to select project in the existing work space ⇒ OK.
6. Exporting a Project to a JAR file: Right-click on the project ⇒ Consign... ⇒ Java, JAR File ⇒ Adjacent ⇒ Select the files to be exported ⇒ Adjacent ⇒ Next ⇒ In "JAR Manifest Specification" dialog, enter the main form (if you wish to run the JAR file directly) ⇒ Finish.
7. Unit Testing: If you lot go on your test in another project, you lot need to include the project under test in your Build Path (see higher up).
   To create a exam case: Right-click on the project ⇒ New ⇒ JUnit Examination Case ⇒ the "New JUnit Test Instance" dialog appears. Select "New JUnit 4 Test". In "Name", enter your class proper noun. In "Class under examination", browse and select the class to be tested.
   To run the test: Right-click ⇒ "Run Equally" ⇒ "JUnit Test". The results are displayed in a special "JUnit console".
8. Adding External JAR files & Native Libraries (".dll", ".lib", ".a", ".so"): Many external Java packages (such as JOGL, Java3D, JAMA, etc) are bachelor to extend the functions of JDK. These packages typically provide a "lib" directory containing JAR files (".jar") (Coffee Archive - a unmarried-file package of Coffee classes) and native libraries (".dll", ".lib" for windows, ".a", ".then" for Linux and macOS).
   To include these external packages into an Eclipse'south project, right-click on the projection ⇒ Build Path ⇒ Add External Archives ⇒ Navigate to select the JAR files (".jar") to be included.
   In "Package Explorer", right-click on the JAR file added ⇒ Backdrop:
   • To include native libraries (".dll", ".lib", ".a", ".so"), select "Native Library" ⇒ "Location Path" ⇒ "External Folder".
   • To include the javadoc, select "JavaDoc Location" ⇒ "JavaDoc URL" ⇒ You can specify a local file or a remote link.
   • To include source file (for debugging), select "Coffee Source Attachment".
   All the above options are besides accessible via project's property ⇒ "Build Path".
   Notes: The JAR files must be included in the CLASSPATH. The native library directories must be included in JRE's property "java.library.path", which usually but non necessarily includes all the paths from the PATH environment variable. Read "External JAR files and Native Libraries".
9. Creating a User Library: You can also create a Eclipse's user library to include a set of JAR files and native libraries, that can then be added into subsequent Eclipse projects.
   For instance, I created a user library for "JOGL" as follows:
   
   1. From "Window" menu ⇒ Preferences ⇒ Java ⇒ Build Path ⇒ User Libraries ⇒ New ⇒ In "User library name", enter "jogl". The "User Library" dialog appears.
   2. In "User Library" dialog ⇒ Select "jogl" ⇒ Add JAR... ⇒ Navigate to <JOGL_HOME>/lib, and select "gluegen-rt.jar" and "jogl.jar".
   3. Aggrandize the "jogl.jar" node ⇒ Select "Native library location: (none)" ⇒ Edit... ⇒ External Folder... ⇒ select <JOGL_HOME>/lib.
   4. Aggrandize the "jogl.jar" node ⇒ Select "Javadoc location: (none)" ⇒ Edit... ⇒ Javadoc in archive ⇒ In "Archive Path", "Browse" and select the downloaded JOGL API documentation zip-file ⇒ In "Path within annal", "Scan" and expand the zip-file to select the superlative-level path (if any) ⇒ Validate. Alternatively, you tin can provide the path to the un-zipped javadocs. This is needed for Eclipse to display javadoc information nigh classes, fields, and methods.
   5. You may provide the source files past editing "Source attachment: (none)". Source is needed just if you are interested to debug into the JOGL source codes.
   For EACH subsequent Coffee projection created that uses JOGL, right-click on the project ⇒ Build Path ⇒ Add together Libraries ⇒ Select "User Library" ⇒ Check "jogl".
10. Running an External Program: Suppose that you desire to run a Perl script on the selected file, y'all can configure an external tool as follows:
    1. From "Run" menu ⇒ External Tools ⇒ External Tools Configuration... ⇒ The "External Tools Configuration" dialog appears.
    2. In "Proper name", enter your tool proper noun.
    3. Choose the "Main" tab ⇒ In "Location", "Browse File System..." to cull the perl interpreter "perl" ⇒ In "Arguments", enter "path/scriptname.pl ${resource_loc}", where ${resource_loc} is an Eclipse variable that denotes the currently selected resource with absolute path.
    4. Choose the "Mutual" tab ⇒ In "Standard Input and Output", uncheck "Allocate Panel", check "File" and provide an output file (east.1000., d:\temp\${resource_name}.txt).
    5. (If you use the CYGWIN perl interpreter, need to prepare environs variable CYGWIN=nodosfilewarning to disable warning message.)
    To run the configured external tool, select a file ⇒ run ⇒ external tool ⇒ tool name.
11. Viewing Hex Code of Primitive Variables in Debug mode: In debug perspective, "Variable" panel ⇒ Select the "card" (inverted triangle) ⇒ Java ⇒ Java Preferences... ⇒ Primitive Display Options ⇒ Check "Display hexadecimal values (byte, short, char, int, long)".
12. Adding a New Version of JDK/JRE: Outset, you lot tin cheque the installed JDK/JRE via "Window" menu ⇒ "Preferences" ⇒ Aggrandize "Java" node ⇒ "Installed JREs". Check the "Location" current JRE installed to make sure that it is the intended one. You can employ the "Add together" button to add together a new version of JRE. For program development, I recommend that you add the JDK (instead of JRE). [The "Location" decides the extension directory used for including additional JAR files, e.yard., $JAVA_HOME\jre\lib\ext.]

For Web Developers

1. HTML Editor: Use the "Web Page Editor" (available in Eclipse Coffee EE), which provides the design view (WYSISYG).
   To use the "Web Folio Editor", right-click on the HTML file, open up as "Web Folio Editor".
   To make the "Spider web Page Editor" equally default for HTML file, goto Window ⇒ Preferenes ⇒ General ⇒ Editor ⇒ File Associations ⇒ .htm and .html ⇒ Select "Web page editor" ⇒ default.

File I/O in Eclipse

Suppose that your desire to write a Coffee plan, which inputs from a text file chosen "xxxx.in" and outputs to a text file chosen "xxxx.out". This is a piddling tricky under Eclipse due to:

1. When you create a text file in Windows' Notepad and saved information technology every bit "xxxx.in", Notepad will suspend the ".txt" to your file and it becomes "xxxx.in.txt". Worse still, the Windows' Explorer, by default, will non show the ".txt" extension. (The first thing I always practice to an alien computer is to change this setting. From "Tools" menu ⇒ Folder Options... ⇒ View ⇒ Uncheck "Hibernate extensions for known file types".) You need to put a pair of double quotes around xxxx.in to override the default ".txt" extension. This is one good reason not to use Notepad for programming at all. Yous should use Eclipse to create the text file instead.
2. Which directory to keep the input file "xxxx.in" in Eclipse?
   • If yous did not split the sources and class files into ii separate directories, then the answer is straight forward, because there is only one directory to identify your input file.
   • If you cull to keep your sources and course files in two carve up directories, eclipse volition create 2 sub-directories "src" and "bin" under the base of operations directory. BUT y'all need to put your input file "xxxx.in" in the base directory of your project, instead of the "src" or "bin"..

For writing simple programs:

• Put the sources, course files, and the input/output files in the aforementioned directory. (When you create a new project, select "Use project folder as root for sources and class files" in "Projection Layout".) (Just put your sources and course files in divide directories for big projection.)
• Yous tin can create you input file from eclipse directly via "File" menu ⇒ "New" ⇒ "File".
• Remember to add a newline to the stop of your input file.
• You may need to right-click the projection and select "Refresh" to see the output file "xxxx.out" created in the parcel explorer.
• To open the "xxxx.in" and "xxxx.out": right-click ⇒ Open up With ⇒ Text Editor.

This is a sample JDK 1.5 program for file input/output:

import java.util.Scanner; import java.util.Formatter; import java.io.File; import java.io.IOException;     public class          FileIOTest          {      public static void main (String [] args) throws IOException {       Scanner in = new Scanner(new File("FileIOTest.in"));               Formatter out = new Formatter(new File("FileIOTest.out"));             int a = in.nextInt();       int b = in.nextInt();       out.format("%d\n",a+b);             out.shut();        } }

Create the input text file called "FileIOTest.in" with the following contents and terminated with a newline:

55 66        

Writing Swing Applications using Eclipse GUI Builder

Eclipse provides a visual GUI builder called "WindowBuilder" (@ https://www.eclipse.org/windowbuilder), which supports AWT/Swing, SWT (Eclipse'due south Standard Widget Toolkit - an alternative to JDK'south AWT/Swing), XWT, GWT, eRCT.

Step 0: Install WindowBuilder

To install "WindowBuilder", goto "Help" ⇒ Install New Software ⇒ In "Work with", enter "https://download.eclipse.org/windowbuilder/latest/" (You can find the proper link from "http://world wide web.eclipse.org/windowbuilder/download.php") ⇒ Check "WindowBuilder" ⇒ Next ⇒ Next ⇒ Take the licence ⇒ Finish.

Step 1: Create a New "Java Application" Project

1. Cull "File" menu ⇒ "New" ⇒ "Java projection".
2. The "New Java Project" dialog pops upwardly.
   1. In the "Project proper name" field, enter "FirstSwingProject".
   2. Check "Use default location".
   3. In the "JRE" box, select "Utilise default JRE (currently 'JDK1.x')".
   4. Click "Finish".

Step 2: Create a Swing JFrame Bracket

1. Choose "File" menu ⇒ "New" ⇒ "Others" ⇒ "WindowBuilder" ⇒ "Swing Designer" ⇒ "JFrame" ⇒ "Next".
2. In the "Create JFrame" dialog ⇒ Enter "SwingMain" in the "Name" field ⇒ "End".
3. Select the "Design" pane.
4. In "Layouts", select "FlowLayout" and click on the "design form".
5. From "Components", select "JLabel" and click on the design grade. Change the label text to "Counter: ". Select a "JTextField" and place information technology on the blueprint form. Change the text to "0". Select a "JButton" and place it on the design grade. Change the text label to "Count".
6. To attach a event-handler to the button, double-click the JButton to switch into the "Source" pane, with the event-handler skeleton created. Complete the actionPerformed() as follows:

   public void actionPerformed(ActionEvent e) {              count++;    textField.setText(count + "");               }

   Add an instance variable chosen count as follow:

   public form SwingMain extends JFrame {              private int count = 0;              ......

7. You lot can now ready run the program. Correct-click on the projection ⇒ Run Every bit ⇒ Java Awarding.

Eclipse Generated Codes

Study the codes generated by Eclipse GUI Builder, as follows, which is only a typical Swing awarding.

1 2 3 4 5 6 7 viii 9 10 11 12 xiii 14 15 xvi 17 18 xix 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

import coffee.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.edge.EmptyBorder; public grade SwingMain extends JFrame { private JPanel contentPane; individual JTextField textField; private int count = 0; public static void main(Cord[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { attempt { SwingMain frame = new SwingMain(); frame.setVisible(truthful); } catch (Exception east) { eastward.printStackTrace(); } } }); } public SwingMain() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 450, 300); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(five, 5, five, five)); setContentPane(contentPane); contentPane.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5)); JLabel lblNewLabel = new JLabel("Counter: "); contentPane.add together(lblNewLabel); textField = new JTextField(); textField.setText("0"); contentPane.add together(textField); textField.setColumns(10); JButton btnCount = new JButton("Count"); btnCount.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent due east) { count++; textField.setText(count + ""); } }); contentPane.add together(btnCount); } }

Eclipse for C/C++ Programming

Here.

Eclipse PDT (PHP Development Tool)

Here.

Eclipse-JavaEE and Database Development

Reference: "Data Tools Platform User Documentation" @ Eclipse Welcome folio.

You need to install:

1. "Eclipse for Coffee EE" (aka "Eclipse IDE for Enterprise Java Developers").
2. "MySQL Community Server" and "MySQL Connector/J Driver". Read "How to install and go started with MySQL".

To use Eclipse for MySQL development:

1. Switch to "Database Evolution" perspective:
   From "Window" bill of fare ⇒ Open up Perspective ⇒ Other ⇒ Database Development.
2. Create a Database Connectedness: Start your MySQL database server ⇒ Right-click "Database Connection" ⇒ New. Take annotation that each database connection connect to ONE particular database in the database server with a URL in the grade of jdbc:mysql://localhost:3306/database-name.
   1. In "Connectedness Profile", choose "MySQL" ⇒ Next.
   2. In "Drivers", click the icon for "New Driver Definition" (if the driver has non been defined).
   3. In "Specify a Driver Template and Definition Name":
      1. Choose the "Name/Type" tab ⇒ Cull one of the database driver as our template (eastward.g. MySQL 5.1) for further customization ⇒ Set up your "Driver name", due east.g., "mysql-connector-coffee-8.0.23".
      2. Switch to "JAR List" tab ⇒ Articulate All ⇒ Click "Add JAR/Naught" and select the driver JAR file, due east.1000., mysql-connector-java-8.0.23.jar.
      3. Switch to "Properties" tab ⇒ Check the parameters.
      4. OK.
      5. Enter the "Database" name, URL (with the same database proper name), and the "Password" ⇒ Click "Examination Connection"
      6. End.
   4. In "Datasource Explorer", you tin can "connect" and "disconnect" the connexion.
3. To view and edit table visually, expand database "Schemas" to look for the table. Right-right on the table ⇒ Information ⇒ Edit. You can modify the cells and "salvage" the changes.
4. To create a new SQL script, cull File ⇒ New ⇒ SQL File ⇒ Y'all may use an existing projection or create a new project (General|Project or Web|Dynamic Spider web Projection) ⇒ Enter filename, and set the connexion profile name ⇒ Finish. Enter a SQL statement (eastward.one thousand., SELECT * FROM tablename) ⇒ Correct-click on the text ⇒ "Execute Current Text" or "Execute All".
5. To use an existing SQL file, drop the file into a project and open the SQL file. In Connection contour, ready the blazon and connectedness name. Right-click on a statement ⇒ "Execute ...".

Developing and Deploying Webapps in Eclipse-JavaEE

Setting Up Eclipse-JavaEE for Web Development

1. Install "Eclipse for Java EE" (aka "Eclipse IDE for Enterprise Java Developers").
2. Install Tomcat (or Glassfish) server.
3. Configuring Web Server: Launch Eclipse ⇒ Window ⇒ Preferences ⇒ Expand the "Server" node ⇒ "Runtime Environments" ⇒ "Add..." ⇒ Expand "Apache" and select "Apache Tomcat vX.Ten" ⇒ Enter your "Tomcat Installation Directory" ⇒ "Terminate".

Writing a Hello-world Servlet

1. Switch to "Java EE" perspective (which is the default perspective for Eclispe-JavaEE):
   From "Window" menu ⇒ Open Perspective ⇒ Other ⇒ Java EE.
2. Create a new Web Awarding Projection: from "File" ⇒ New ⇒ Dynamic Web Project (under "Web" category) ⇒ In "Projection Proper name", enter "HelloServletProject" ⇒ "End".
3. Create a new Servlet: Correct-click on the project "HelloServletProject" ⇒ New ⇒ Servlet ⇒ In "Java Bundle", enter "mypkg"; in "Form Proper noun", enter "HelloServlet" ⇒ Next ⇒ In "URL Mappings", select "/HelloServlet" ⇒ "Edit" to "/sayhello" ⇒ Next ⇒ In "Which method stubs would you similar to create", check "Inherited abstract method", "doGet" and "doPost" (default) ⇒ Finish.
   In "HelloServlet.java", enter the following codes:

   package mypkg;  import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;   @WebServlet("/sayhello") public class HelloServlet extends HttpServlet {    private static final long serialVersionUID = 1L;         public HelloServlet() {       super();           }         protected void doGet(HttpServletRequest request, HttpServletResponse response)          throws ServletException, IOException {              response.setContentType("text/html");              PrintWriter out = response.getWriter();              out.println("<!DOCTYPE html>");       out.println("<html>");       out.println("<head><title>How-do-you-do Servlet</championship></head>");       out.println("<body>");       out.println("<h1>Hello World, from Servlet!</h1>");       out.println("<p>Method: " + request.getMethod() + "</p>");       out.println("<p>Asking URI: " + asking.getRequestURI() + "</p>");       out.println("<p>Protocol: " + request.getProtocol() + "</p>");       out.println("<p>PathInfo: " + request.getPathInfo() + "</p>");       out.println("<p>Remote Address: " + asking.getRemoteAddr() + "</p>");              out.println("<p>Generate a Random Number per asking: <strong>" + Math.random() + "</strong></p>");       out.println("</trunk>");       out.println("</html>");    }         protected void doPost(HttpServletRequest request, HttpServletResponse response)          throws ServletException, IOException {              doGet(request, response);    } }

   (For Servlet ii.iv/ii.5 with Tomcat 6) The note @WebServlet is new in Servlet 3.0 and is not supported in Servlet ii.iv/2.5. Hence, yous need to manually configure the URL for the servlet in the Web Awarding Deployment Descriptor "web.xml" under directory "WEB-INF", as follows:

   <?xml version="1.0" encoding="ISO-8859-1"?> <spider web-app xmlns="http://coffee.sun.com/xml/ns/javaee"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xsi:schemaLocation="http://java.lord's day.com/xml/ns/javaee http://coffee.dominicus.com/xml/ns/javaee/web-app_3_0.xsd"   version="iii.0" metadata-complete="true">     <servlet>     <servlet-name>HelloServletExample</servlet-name>     <servlet-grade>mypkg.HelloServlet</servlet-course>   </servlet>     <servlet-mapping>     <servlet-proper name>HelloServletExample</servlet-proper name>     <url-pattern>/sayhello</url-blueprint>   </servlet-mapping>   </spider web-app>

4. To execute the Servlet, correct-click on the "HelloServletProject" ⇒ "Run As" ⇒ "Run on Server" ⇒ Change the URL to "http://localhost:8080/HelloServletProject/sayhello".

Writing a Hello-globe JSP (Java Server Pages)

1. Create a new Web Application: File ⇒ New ⇒ Dynamic Web Projection (nether "Web" category) ⇒ In "Project Proper noun", enter "HelloJSPProject" ⇒ Terminate.
2. Create a new JSP File: Correct-click on the project "HelloJSPProject" ⇒ New ⇒ JSP File ⇒ The parent folder shall be "HelloJSPProject/WebContent" ⇒ In "File Name", enter "hullo.jsp" ⇒ "Finish".
3. Enter the post-obit HTML/JSP codes:

   <%@ page language="coffee" contentType="text/html; charset=ISO-8859-1"     pageEncoding="ISO-8859-ane"%> <!DOCTYPE html> <html> <head> <meta charset="ISO-8859-i"> <championship>Hello JSP</title> </caput> <body> <h1>Hullo World, from JSP</h1> <p>Method:              <%= request.getMethod() %></p> <p>Asking URI:              <%= request.getRequestURI() %></p> <p>Protocol:              <%= request.getProtocol() %></p> <p>PathInfo:              <%= request.getPathInfo() %></p> <p>Remote Address:              <%= request.getRemoteAddr() %></p>              <% double num = Math.random(); if (num > 0.75) { %>              <h2>You'll take a lucky twenty-four hour period!</h2><p>(<%= num %>)</p>              <% } else { %>              <h2>Well, life goes on ... </h2><p>(<%= num %>)</p>              <% } %>              <h3><a href="<%= request.getRequestURI() %>">Attempt Again</a></h3> </trunk> </html>

4. To execute the JSP, right-click on "hello.jsp" ⇒ Run As ⇒ Run on Server.

Exporting a Webapp as a War file

Correct-click on the projection to be exported ⇒ Consign ⇒ War File ⇒ In "Destination", specify the destination directory and filename (the filename shall be the web application name) ⇒ Cease.

1. To deploy the war file in Tomcat, but driblet the war file into Tomcat's "webapps" binder. The state of war file will exist automatically extracted and deployed. The web application proper noun is the war-filename.
2. You could use WinZip (or WinRAR) to view the content of the state of war file, as war-file is in Naught format.

Deploying a webapp exterior the Tomcat's webapps directory

To deploy a webapp (chosen hello) outside the %TOMCAT_HOME%\webapps directory, create a hello.xml file as follows and place it under the %TOMCAT_HOME%\conf\Catalina\localhost:

<Context displayName="how-do-you-do"      docBase="C:\path\to\webapp"      path="/howdy"      reloadable="true" />        

Writing a Howdy-world JSF (JavaServer Faces)

[TODO]

Debugging Webapps

You can debug a webapp simply similar standalone awarding. For example, you tin can set breakpoints, single-stride through the programs, etc.

REFERENCES & Resources

1. Eclipse female parent site @ https://world wide web.eclipse.org.
2. Eclipse documentation and user guides, accessible via Eclipse's Help and carte.

Latest version tested: Eclipse Java and Eclipse JavaEE 2022-12
Terminal modified: Jan 2022

Source: https://www3.ntu.edu.sg/home/ehchua/programming/howto/eclipsejava_howto.html

Posted by: turnagethadfice.blogspot.com

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