很急，大虾指教！！！！

Question

import java.awt.*;
public class LoginFrame extends Frame
{
     public LoginFrame()
     {
          super("UserLogin");
          this.setSize(280,120);
          this.setBackground(Color.lightGray);
          this.setLocation(300,240);
          this.setLayout(new FlowLayout());
          this.add(new Lable("userid"));
          this.add(new TextField("user1",20));
          this.add(new Lable("password"));
          this.add(new TextField(20));
          this.add(new Button("OK"));
          this.add(new Button("Cancel"));
          
          this.setVisible(true);
     }
     public static void main(String args[])
     {
          new LoginFrame();
     }
}
这个代码为什么不能运行出现窗口！

Answer 1

把一楼说的哪个  LABEL 改了就可以了~
你那代码我运行了  是可以用的~

Answer 2

最好把setVisible(true)放在对实例的调用里

Answer 3

import   java.awt.*;
public   class   LoginFrame   extends   Frame
{
          public   LoginFrame()
          {
                    super( "UserLogin ");
                    this.setSize(280,120);
                    this.setBackground(Color.lightGray);
                    this.setLocation(300,240);
                    this.setLayout(new   FlowLayout());
                    this.add(new   Lable( "userid "));//Label写错了
                    this.add(new   TextField( "user1 ",20));
                    this.add(new   Lable( "password "));//Label写错了
                    this.add(new   TextField(20));
                    this.add(new   Button( "OK "));
                    this.add(new   Button( "Cancel "));
                   
                    this.setVisible(true);
          }
          public   static   void   main(String   args[])
          {
                    new   LoginFrame();
          }
} 

Answer 4

package zhao;
import java.awt.*; import javax.swing.JFrame;
public class Test extends JFrame //建议用JFrame
{ 
     public Test() 
     { 
          super("UserLogin"); 
          this.setSize(280,120); 
          
          this.setBackground(Color.lightGray); 
          this.setLocation(300,240); 
          this.setLayout(new FlowLayout()); 
          this.add(new Label("userid")); //Label写错了,应该在编译期间出错的!
          this.add(new TextField("user1",20)); 
          this.add(new Label("password")); 
          this.add(new TextField(20)); 
          this.add(new Button("OK")); 
          this.add(new Button("Cancel")); 
          
          //加上这语句!
          this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
           
          this.setVisible(true); 
     } 
     public static void main(String args[]) 
     { 
          new Test(); 
     } 
}