Working With Eclipse

This chapter details the steps to configure Eclipse to use the Oracle Java ME Embedded Client SDK as a Java platform, and presents a sample project and a sample application to run in your configured environment.

Oracle Java ME Embedded Client SDK and Eclipse Projects

This section describes how to add the Oracle Java ME Embedded Client SDK as a Platform in Eclipse and how to create a new project in Eclipse.

Adding a Java Platform

Before You Begin

Launch Eclipse and follow these steps:

1. Select Window > Preferences.

   The Preferences Window opens.

2. In the Preferences window, go to the left panel, expand the Java item, and select Installed JREs.
   

   The central panel displays the JREs on this machine.

3. Click the Add button on the right to open the Add JRE window.

   The window displays the JRE Type options.

4. Select Execution Environment Description and click Next.
   

   The window displays the JRE definition panel.

5. In the Definition File field, click File to open a file chooser window.
   1. Navigate to /usr/local/Oracle_JavaME_Embedded_Client/1.0/emulator-platform .
      
   2. Select ojec_re_def.ee and click OK to close the file chooser window.
6. Click Finish to load the Oracle Java ME Embedded Client JRE and close the Add JRE window.

   The Installed JREs panel lists Oracle Java Micro Edition Embedded Client 1.0 as an installed JRE.

7. Check the box in front of Oracle Java Micro Edition Embedded Client 1.0 and click OK.
   

   Now you are ready to develop applications for the Oracle Java ME Embedded Client.

Writing Your First Application

After completing the steps documented in the previous task, Eclipse has the JRE platform required to build and run Oracle Java ME Embedded Client applications.

1. Select File > New > Project and then Java Project.

   The Create a Java Project window is displayed.

2. In the Create a Java Project window, perform the following actions:
   
   1. Enter a project name, such as HelloWorld.
   2. In the JRE area, select Use a project specific JRE and choose Oracle Java Micro Edition Embedded Client 1.0.
   3. For this example, choose Create separate folders for sources and class files.
   4. Click the Finish button.

   The new project HelloWorld is created along with separate directories for sources and class files, src and bin respectively.

3. Select File > New > Class.

   The New Java Class window opens.

4. In the New Java Class window, perform the following actions:
   
   1. The Source folder field should be populated. If it isn’t, browse for the folder.
   2. In the Package field, use lower case characters to enter a name.
   3. In the Name field, enter the class file name.
   4. In the method stubs area, deselect the Inherited abstract methods option and check:

      public static void main(String[] args)

5. Click Finish to create the file Hello.java in the src folder.

   The new Hello.java file in the src folder is an empty template and must be modified.

6. In Hello.java, add a print line to the body of the main function:

   package hello;
   public class Hello {
       /**
        * @param args
        */
       public static void main(String[] args) {
           // TODO Auto-generated method stub
           System.out.println("Hello World");
       }
   } 

7. Click the green triangle Run button to compile and run your code.

   The Hello World message prints in the console.