帮看一段简单的程序吧
import   javax.microedition.midlet.MIDlet;
import   javax.microedition.lcdui.*;
public   class   LoginMidlet   extends   MIDlet   implements   CommandListerer{
private   Display   display;
private   TextField   userName;
private   TextField   password;
private   Form   form;
private   Command   cancel;
private   Command   login;
public   LoginMidlet(){
userName   =   new   TextField( "用户名： ", " ",10,TextField.ANY);
password   =   new   TextField( "密码： ", " ",10,TextField.PASSWORD);
form   =   new   Form( "登录 ");
cancel   =   new   Command( "取消 ",Command.CANCEL,2);
login   =   new   Command( "登录 ",Command.OK,2);
public   void   startApp(){
display   =   Display.getDisplay(this);
form.append(userName);
form.append(password);
form.append(cancel);
form.append(login);
form.setCommandListener(this);
display.setCurrent(form);
}
public   void   pauseApp(){
}
public   void   destroyApp(boolean   unconditional){
notifyDestroyed();
}
public   void   validateUser(String   name,String   password){
if(name.equals( "admin ")   &&   password.equals( "admin888 ")){
menu();
}else{
tryAgain();
}
}
public   void   menu(){
List   services   =   new   List( "请选择 ",Choice.EXCLUSIVE);
services.append( "验证邮件 ",null);
services.append( "公司 ",null);
services.append( "地址 ",null);
services.append( "选项 ",null);
services.append( "退出 ",null);
display.setCurrent(services);
}
public   void   tryAgain(){
Alert   error   =   new   Alert( "登录错误 ", "请重试 ",null,AlertType.ERROR);
error.setTimeout(Alert.FOREVER);
userName.setString( " ");
password.setString( " ");
display.setCurrent(error,form);
}
public   void   commandAction(Command   c,Displayable   d){
String   label   =   c.getLagel();
if(label.eauqls( "取消 ")){
destroyApp(true);
}else   if(label.equals( "登录 ")){
validateUser(userName.getString(),password.getString());
}
}
}
}


Project   settings   saved
Building   "LoginMidlet "
C:\Program   Files\WTK25\apps\LoginMidlet\src\LoginMidlet.java:16:   非法的表达式开始
public   void   startApp(){
                                ^
C:\Program   Files\WTK25\apps\LoginMidlet\src\LoginMidlet.java:61:   需要   '; '
}
                ^
2   错误
com.sun.kvem.ktools.ExecutionException
Build   failed


------解决方案--------------------
无语了,你自己对书好好看看吧,你把方法放到方法里了...
------解决方案--------------------
。。。。比我还新人， 哈哈
构造函数里面不能写方法
------解决方案--------------------
Command用addCommand()来添加,不能用append