showgauge.java

编写j2me程序时,必备的midlet扩展类.

import javax.microedition.midlet.*; 
import javax.microedition.lcdui.*; 

public class ShowGauge extends MIDlet implements CommandListener 
{ 
private Display display; 
private Form props; 

private Command exitCommand = new Command("Exit", Command.EXIT, 1); 

public ShowGauge() 
{ 
display = Display.getDisplay(this); 
} 

public void startApp() 
{ 


props = new Form("Hello World"); 
//props.append("Hello World!\n"); 
Gauge gauge=new Gauge("show gauge",true,100,50); 
props.append(gauge); 
props.addCommand(exitCommand); 
props.setCommandListener(this); 
display.setCurrent(props); 
} 

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

public void destroyApp(boolean unconditional) 
{ 
} 

public void pauseApp() 
{ 
display.setCurrent(null); 
props = null; 
} 

}