helloworld.java

j2me無線學習源碼,一個無線連接的源碼,很有用的哦

//HelloWorld.java file
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

public class HelloWorld extends MIDlet implements CommandListener
{

    private Command exitCommand,helpCommand,backCommand;
    private Command canvasCommand1,canvasCommand2,canvasCommand3;   
    public HelloWorld()
    {
    }
    protected void startApp(  ) throws MIDletStateChangeException
    {
        //创建窗口对象
        TextBox tb =new TextBox("Hello MIDlet","Hello,World!",15,0);
        //创举多个Command 对象
        helpCommand =new Command("HELP",Command.HELP,1);
        backCommand =new Command("BACK",Command.BACK,2);
        exitCommand =new Command("EXIT",Command.EXIT,2);
        canvasCommand1 =new Command("Canvas1",Command.SCREEN,3);
        canvasCommand2 =new Command("Canvas2",Command.SCREEN,3);
        canvasCommand3 =new Command("Canvas3",Command.SCREEN,3);
        //添加菜单命令到窗口中
        tb.addCommand(exitCommand);
        tb.addCommand(helpCommand);
        tb.addCommand(backCommand);
        tb.addCommand(canvasCommand1);
        tb.addCommand(canvasCommand2);
        tb.addCommand(canvasCommand3);
        //设置命令处理对象
        tb.setCommandListener(this);
        //显示窗口对象
        Display.getDisplay(this).setCurrent(tb);
        System.out.println("startApp");
    }

    protected void pauseApp(  )
    {
        System.out.println("pauseApp");
    }

    protected void destroyApp( boolean p1 )
    {
        System.out.println("destroyApp");
    }

    public void commandAction(Command c,Displayable d)
    {
        if (c ==exitCommand)
        {
            destroyApp(false);
            notifyDestroyed();
        }
    }
}