Java/lang/VeryifyError

Question

when I try to run this java app i get the java/lang/VerifyError
This is the .java file:
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class FlashLight extends MIDlet implements CommandListener {
Display display = null;
List menu = null;
static final Command turnoffCommand = new Command("Turn off", Command.STOP, 0);
public FlashLight() {
public void startApp() throws MIDletStateChangeException {
display = Display.getDisplay(this);
display.flashBacklight(30000);
TextField minute = new TextField("The flash light will stay on for 5 minutes unless terminated first.", "", 40, TextField.ANY);
Form input = new Form("Flash Light is on");
input.addCommand(turnoffCommand);
input.setCommandListener(this);
input.append(minute);
display.setCurrent(input);
public void pauseApp() {
display.flashBacklight(0);
notifyPaused();
public void destroyApp(boolean unconditional) {
notifyDestroyed();
public void commandAction(Command c, Displayable d) {
String label = c.getLabel();
if (label.equals("Turn off")) {
display.flashBacklight(0);
destroyApp(true);
This is the batch log:
JBlend Device Emulator
Copyright 2000-2005 Aplix Corporation. All rights reserved.
Platform Power on!
Params for NAppMain(): "-Xdescriptor:I:\Mobile Files\Java Apps\FlashLight\FlashL
ight.jad"
Params for NAppMain(): "-Xdevice:ROKR_E1"
=== service API trace: AmJBlendInitialize()
type: 2
bssAddress: 0x005ed000 bssSize: 0xa200
dataAddress: 0x0081a000 dataSize: 0xe088
initDataAddress: 0x01660048
-jam address 0x5ed790 : 0x5ed7b4
5ed000 : 5ed790
5ed7b4 : 5f7200
Pixel format is 16-bit RGB=555
[PushEventThread]thread starts.
VM variable initialization.
type: 2
bssAddress: 0x005ed000 bssSize: 0xa200
dataAddress: 0x0081a000 dataSize: 0xe088
initDataAddress: 0x01660048
-jam address 0x5ed790 : 0x5ed7b4
5ed000 : 5ed790
5ed7b4 : 5f7200
ExtLib: jarAddress:0x005f8a70 length:149198 jarReader:0x00000000
VM heap 0x01d6002c 0xc8000
ROMIZE byteCode Size ROM:237616 RAM:49
ALERT: java/lang/VerifyError: FlashLight.
kvm_main return code = 127
PrecheckUtil: save OK. result = -2
PrecheckUtil: load OK. result = -2
NAppVm Create VM Thread
AamsVmStartMIDP(vmId=1, heapSize=819200, heapAddr=1d6002c javaApp=16803a0 argc=0
jbVmVmStartMIDP(vmId=1,heapSize=819200,heapAddr=0x01d6002c)
jbVmVmInitialize(vmId=1,heapSize=819200,heapAddr=0x01d6002c
section bss address: 5ed000 size 41472
section data address: 81a000 size 57480
section size data 57480 bss 41472
section save size data 19029 bss 41472
all class blocks 761
instance class blocks 737
array class blocks 24
sizoef class blocks 45180
newHeapAddr=0x01d6ecdc, newHeapSize=758608
JBlend[micro] Copyright 2000-2004 Aplix Corporation. All rights reserved.
build date : 2005-12-07_00:53
VM variable initialization.
type: 2
bssAddress: 0x005ed000 bssSize: 0xa200
dataAddress: 0x0081a000 dataSize: 0xe088
initDataAddress: 0x01660048
-jam address 0x5ed790 : 0x5ed7b4
5ed000 : 5ed790
5ed7b4 : 5f7200
===> jbVmStartMIDP
vmId:1
heapAddr:0x1d6ecdc
heapSize:758608
EventHandler:417c49
vmParamCount:0
vmParams:0x167ff90
vmParamLens:0xfc67ac
===> JKT_MIDP_Application
jarAddr:0x1680424
jarSize:2779
jarRead:0x0
className:0
classNameLen:0
jadAddr:0xfc263c
jadSize:426
jadRead:0x0
trusted:0
ExtLib: jarAddress:0x005f8a70 length:149198 jarReader:0x00000000
VM heap 0x01d6ece8 0xb9344
ROMIZE byteCode Size ROM:237616 RAM:49
JkPrecheckValidateApplication(1) => -2
GCF Extension: Scheme:socket
GCF Extension: Scheme:datagram
GCF Extension: Scheme:file
GCF Extension: Scheme:comm
----- JB_VMEVENT_VM_STARTED callback begin.
[vmEvent] JK_VMEVENT_VMSTARTED
-N-A-P-P-_ VJMB__EVVMEENVTE_NSTT_AVRMT_ESDT ArReTcEeDi vceadl
lback end.
----- VM JK_VMEVENT_VMPAINTREADY callback begin.
[vmEvent] JK_VMEVENT_VMPAINTREADY
----- VM JK_VMEVENT_VMPAINTREADY callback end.
ALERT: java/lang/VerifyError: FlashLight.
kvm_main return code = 127
----- JB_VMEVENT_VM_STOPPED callback begin.
[vmEvent] JK_VMEVENT_VMSTOPPED
-N-A-P-P-_ VJMB__EVVMEENVTE_NSTT_OVPMP_ESDT OrPePcEeDi vceadl
lback end.
core exit status: 127
AamsVmStartMIDP return code = -127
jk_jabwt_terminate_bt
NAPP_VM_EVENT_THREAD_TERMINATE received
OptimizeRms() starting ...
OptimizeRms() done.
Could someone tell me what I've done wrong?

Answer 1

I just thought I would let you know that I changed the .java file without success.
Here is the new .java source:
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class FlashLight extends MIDlet implements CommandListener {
Display display = null;
Form menu = null;
StringItem warn = null;
public FlashLight() {
static final Command turnoffCommand = new Command("Turn off", Command.STOP, 0);
public void startApp() throws MIDletStateChangeException {
display = Display.getDisplay(this);
warn.setText("The flash light will stay on for 5 minutes unless terminated first.");
menu = new Form("Flash Light is on");
menu.append(warn);
menu.addCommand(turnoffCommand);
menu.setCommandListener(this);
mainMenu();
void mainMenu() {
display.setCurrent(menu);
display.flashBacklight(30000);
public void pauseApp() {
notifyPaused();
public void destroyApp(boolean unconditional) {
notifyDestroyed();
public void commandAction(Command c, Displayable d) {
String label = c.getLabel();
if (label.equals("Turn off")) {
display.flashBacklight(0);
destroyApp(true);
}