redarmy21cn
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于 2004-04-27 18:24
import javax.microedition.midlet.*; import javax.microedition.lcdui.*;
public class FormTest extends MIDlet { public Display display; public List list1; public Command okCmd; public Command exitCmd; public FormTest() { display.getDisplay(this); list1=new List("My First Program",List.IMPLICIT); okCmd=new Command("OK",Command.BACK,1); exitCmd=new Command("EXIT",Command.EXIT,1); list1.addCommand(okCmd); list1.addCommand(exitCmd); } public void startApp() { System.out.println("Start"); display.setCurrent(list1); } public void pauseApp() { } public void destroyApp(boolean unconditional) { } }
Project "NewOne1" loadedProject settings savedBuilding "NewOne1"Build completeRunning with storage root DefaultColorPhoneStartstartApp threw an Exception java.lang.NullPointerExceptionjava.lang.NullPointerException at FormTest.startApp(+16) at javax.microedition.midlet.MIDletProxy.startApp(+7) at com.sun.midp.midlet.Scheduler.schedule(+266) at com.sun.midp.main.Main.runLocalClass(+28) at com.sun.midp.main.Main.main(+116) 其中List换成Form,Canvas,都会出现同样的问题,请各位高手帮帮我!!
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