手工编译却运行不了

SimpleMIDlet.java

import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;


public class SimpleMIDlet extends MIDlet implements CommandListener

{

	private Display display;

	private TextBox tbxMain;

	private Command cmdExit;


	public SimpleMIDlet()

	{

		display = Display.getDisplay(this);

		cmdExit = new Command("退出", Command.SCREEN, 1);

		tbxMain = new TextBox("Simple MIDlet", "Welcome", 50, 0);

		tbxMain.addCommand(cmdExit);

		tbxMain.setCommandListener(this);

	}


	public void startApp()

	{

		display.setCurrent(tbxMain);

	}


	public void pauseApp(){}


	public void destroyApp(boolean unconditional){}


	public void commandAction(Command c, Displayable dis)

	{

		if (c == cmdExit)

		{

			destroyApp(false);

			notifyDestroyed();

		}

	}

}

编译 SimpleMIDlet.java
[img=http://album.hi.csdn.net/app_uploads/cdlmagical/20090618/102819328.p.jpg?d=20090618102902921][/img]

SimpleMIDlet.jad

MIDlet-1: SimpleMIDlet,,SimpleMIDlet

MIDlet-Jar-Size: 1239

MIDlet-Jar-URL: SimpleMIDlet.jar

MIDlet-Name: SimpleMIDlet

MIDlet-Vendor: Magicalboy's Office

MIDlet-Version: 1.0

MicroEdition-Configuration: CLDC-1.0

MicroEdition-Profile: MIDP-1.0

MANIFEST.MF

MIDlet-Name: SimpleMIDlet

MIDlet-Version: 1.0

MIDlet-Vendor: Magicalboy's Office

MIDlet-1: SimpleMIDlet,,SimpleMIDlet

MicroEdition-Profile: MIDP-1.0

MicroEdition-Configuration: CLDC-1.0

生成 SimpleMIDlet.jar
[img=http://album.hi.csdn.net/app_uploads/cdlmagical/20090618/102820265.p.jpg?d=20090618103006781][/img]
SimpleMIDlet.jar
│  SimpleMIDlet.class
│
└─META-INF
        MANIFEST.MF


问题是我手工在命令行窗口编译的类文件运行有错误:
[img=http://album.hi.csdn.net/app_uploads/cdlmagical/20090618/103412281.p.jpg?d=20090618103418687][/img]

Running with storage root DefaultColorPhone

Running with locale: Chinese (Simplified)_People's Republic of China.936

Method............: 10221664 'com/sun/midp/midlet/MIDletState.createMIDlet (static)' 

Stack Chunk.......: 36d00ac

Frame Pointer.....: 36d0104

Current IP........: 10327513 = 103274f6 + offset 29

Previous Frame....: 36d00cc

Previous IP.......: 103bb579 (offset 22)

Frame size........: 7 (1 arguments, 6 local variables)

Argument[0].......: 36d087c

Local[1]..........: 0

Local[2]..........: 384f394

Local[3]..........: 36dfecc

Local[4]..........: 384f3a8

Local[5]..........: 10263184

Local[6]..........: 384f374

Operand[1]........: 36d087c


Method............: 10283b04 'com/sun/midp/midlet/Selector.run (virtual)' 

Stack Chunk.......: 36d00ac

Frame Pointer.....: 36d00cc

Current IP........: 103bb579 = 103bb563 + offset 22

Previous Frame....: 0

Previous IP.......: 1

Frame size........: 6 (1 arguments, 5 local variables)

Argument[0].......: 36d0a08

Local[1]..........: 36dffa8

Local[2]..........: 36d087c

Local[3]..........: 0

Local[4]..........: 0

Local[5]..........: 0

Operand[1]........: 36dffa8


VM status:

Instruction pointer.: 10327513 (offset within invoking method: 29)

Next instruction....: 0x4c

Frame pointer.......: 36d0104

Local pointer.......: 36d00e8

Stack size..........: 128; sp: 36d011c; ranges: 36d00b4-36d02b4;

Contents of the current stack frame:

    36d00e8: 36d087c (lp)

    36d00ec: 0

    36d00f0: 384f394

    36d00f4: 36dfecc

    36d00f8: 384f3a8

    36d00fc: 10263184

    36d0100: 384f374

    36d0104: 36d00cc (fp)

    36d0108: 103bb579

    36d010c: 36d00e4

    36d0110: 10221664

    36d0114: 36d00ac

    36d0118: 0 (end of frame)

    36d011c: 36d087c (sp)

Execution stack contains 108 items: 

36d0a08  

36dffa8  

36d087c  

0  

ALERT: java/lang/ClassFormatError: Bad version information.

0  

0  

0  

1  

384f378  

10283b04  

36d00ac  

0  

36dffa8  

36d087c  

0  

384f394  

36dfecc  

384f3a8  

10263184  

384f374  

36d00cc  

103bb579  

36d00e4  

10221664  

36d00ac  

0  

36d087c  


Execution completed.

3413412 bytecodes executed

60 thread switches

1647 classes in the system (including system classes)

17645 dynamic objects allocated (528524 bytes)

2 garbage collections (458116 bytes collected)

Execution completed.

3413412 bytecodes executed

60 thread switches

1647 classes in the system (including system classes)

17645 dynamic objects allocated (528524 bytes)

2 garbage collections (458116 bytes collected)

如果把里面的类换成在Eclipse编译好的就没问题:
[img=http://album.hi.csdn.net/app_uploads/cdlmagical/20090618/103614125.p.jpg?d=20090618103618812][/img]

到底是哪里编译出了问题呢?