?? keytest.java
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package keyTest;import javax.microedition.lcdui.*;import javax.microedition.midlet.*;public class keyTest extends MIDlet implements CommandListener{ private Display display; private keyTestCanvas myCanvas; private Command exitCmd = new Command(" 退出", Command.SCREEN, 1); public keyTest() { myCanvas = new keyTestCanvas(); display = Display.getDisplay(this); myCanvas.addCommand(exitCmd); myCanvas.setCommandListener(this); } public void startApp() { display.setCurrent(myCanvas); } public void pauseApp() { } public void destroyApp(boolean unconditional) { } public void commandAction(Command cmd, Displayable disp) { if(cmd == exitCmd){ destroyApp(false); } }}
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