How To Create A Basic Java Application

The following describes how to create a new Java application with automatically inserted class templates (also see Application).

Create a new empty project

	Create an empty project Click on the File menu and select New in the JoC Manager to open the configuration wizard.
	Select a panel There are several ways to select a board in the next step. When an JoC board is connected to the computer the Auto-Set button can be pressed to select the board currently in use. In case there is no board available select an JoC board.
	Create the new empty project The Create New button can be clicked after the desired panel is selected.

Add Java class files to the empty project

	Add Java class files To add a basic Java application to the JoC project select New on the "Java" ribbon. Follow the dialogs to create two basic template classes, a Main Class and an Application Class. The files can be located anywhere, it's however recommended to keep all files in the same root folder.
	Both java classes will be added to the newly created Java App. Notice that the Main Class has a special icon. It contains the main entry point of the Java application: public static void main(String[] args) There can only be one Main Class in an Java application. The Java application can already be build but want do anything interesting yet.

Add the following code to write simple text messages to the console every second.

Add code to the App class:

Put the following code in the application class, e.g. App.

private int countOnUpdateMethodCall;

Put the following code into the constructor App().

     try
     {
        countOnUpdateMethodCall = 0;
        Console.println(" " + countOnUpdateMethodCall +
                       ". onUpdate() call \r");
     }
     catch(Exception exc)
     {
        Logger.e(exc.getMessage());
     }

Put the following code into the onUpdate() method.

     // count each call to the onUpdate() method
     countOnUpdateMethodCall++;

     try
     {
        // draw the count of the onUpdate() calls to the screen
        Console.println(" " + countOnUpdateMethodCall +
                       ". onUpdate() call \r");
     }
     catch(Exception exc)
     {
        Logger.e(exc.getMessage());
     }

     // wait a second
     try
     {
        Thread.sleep(1000);
     }
     catch(InterruptedException ie)
     {
        Logger.e(ie.getMessage());
     }

After coding is done

Run the program

Click the Run button. This will start the debugger. Notice that everything will be automatically downloaded to the JoC board. Feel free to add breakpoints to the OnUpdate() method. Now, every second a message is written to the screen.