Java Tips - How to retrieve system properties in a Midlet

This J2ME tips illustrates the retrieval of system properties in a MIDlet. MIDlets have direct access to all four of the standard system properties defined by the CLDC specification.


import javax.microedition.lcdui.Display;

import javax.microedition.lcdui.Displayable;

import javax.microedition.lcdui.Form;

import javax.microedition.midlet.MIDlet;



/* Creates the "Hello world" program in J2ME MIDP.

Note that the class must be public so that the device

application management software can instantiate it. */



public class HelloWorld extends MIDlet

{



  public void startApp() {



    // Create a Displayable widget.

    form = new Form("Hello World");

    // Add a string to the form.

    String msg = "My first MIDlet!";

    form.append(msg);

    // This app simply displays the single form created

    // above.

    display = Display.getDisplay(this);

    display.setCurrent(form);

    printSystemProperties();



  }





/* Prints the values of the standard system properties

using the System.getProperty() call. */



  protected void printSystemProperties()

  {



    String conf;

    String profiles;

    String platform;

    String encoding;

    String locale;



    conf = System.getProperty("microedition.configuration");

    System.out.println(conf);



    profiles = System.getProperty("microedition.profiles");

    System.out.println(profiles);



    platform = System.getProperty("microedition.platform");

    System.out.println(platform);



    encoding = System.getProperty("microedition.encoding");

    System.out.println(encoding);



    locale = System.getProperty("microedition.locale");

    System.out.println(locale);

    System.out.println();

  }

}

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