测试内存

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

public class HelloWorldMIDlet
    extends MIDlet
    implements CommandListener{
    
    private Display display;    private Form. props;    private Command exitCommand=new Command("退出",Command.EXIT,1);
   
    public HelloWorldMIDlet(){
    display=Display.getDisplay(this);
    }
   
    public void startApp(){
    props=new Form("Emulator Memory:");
    props.append("This emulator :\n");    Runtime runtime = Runtime.getRuntime();
    runtime.gc();
      props.append("Free Memory : " + runtime.freeMemory()+"\n");
    props.append("Total Memory : " + runtime.totalMemory()+"\n");
    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() {}  }





 Runtime.getRuntime().freeMemory