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Building "MyProject3"
C:\WTK25\apps\MyProject3\src\IMPListTest.java:5: 方法声明无效；需要返回类型
public IMPListTest( ) {
  ^
1 错误
com.sun.kvem.ktools.ExecutionException
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这是编译后出现的错误

以下是程序
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class IMPLisTest extends MIDlet implements CommandListener{
private Display display;
public IMPListTest( ) {
display = Display.getDisplay(this);

}
protected void startApp() throws MIDletStateChangeException {
List aList = new List("多媒体",List.IMPLICIT);
aList.append(" 音乐 ",null);
aList.append(" 视频 ",null);
aList.setCommandListener(this);
display.setCurrent(aList);
}
protected void pauseApp() { }
protected void destroyApp(boolean arg0) throws MIDletStateChangeException { }
public void commandAction(Command command, Displayable display) {
if (command==List.select_command){
List test= (List) display ;
int selected = test.getSelectedIndex();
}
}


}

那点错了???
怎么改

貌似在最后一行还加个括号就可以了，程序本身好像没有错吧。

不是吧 那样就更错了哈

不好意思，刚才没看完，
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class IMPLisTest extends MIDlet implements CommandListener
{
private Display display;
public IMPLisTest() {
display = Display.getDisplay(this);

}
protected void startApp() throws MIDletStateChangeException
{
List aList = new List("多媒体",List.IMPLICIT);
aList.append(" 音乐 ",null);
aList.append(" 视频 ",null);
aList.setCommandListener(this);
display.setCurrent(aList);
}
protected void pauseApp() { }
protected void destroyApp(boolean arg0) throws MIDletStateChangeException { }
public void commandAction(Command command, Displayable display)
{
if (command==List.SELECT_COMMAND)
{
List test= (List) display ;
int selected = test.getSelectedIndex();
}
}
}
我机子上运行没问题了
List.SELECT_COMMAND和List.select_command有区别

class IMPLisTest

这儿少写了一个t，class IMPListTest

构造函数和类名不相同

推荐使用Eclipse啊。。
if (command==List.SELECT_COMMAND)
这种错误很容易避免的。。