为什么老弹不出对话框?????大家帮忙啊!!

我的题目是:"有一个窗口，该窗口有两个依赖于它的对话框，一个对话框负责求圆的面积，另一个负责求三角形的面积"
package A;import java.awt.*;
import java.applet.*;import java.awt.Frame;
import java.awt.Button;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
/**
* Title: 
* Description: 
* Copyright: Copyright (c) 2006
* Company: 
* @author not attributable
* @version 1.0
*/public class Frame1 extends Frame {
 private static Frame win;
 private Button button1;
 private Button button2;
 Dialog D;
Dialog D1;
 public double area()
{
 int r=5;
 return r*r*3.14;
}
public double area1()
{
 int r=5;
 return r*r;
}
 public Frame1() {
 win=new Frame("My window");//设置窗体
 win.setBackground(Color.white ) ;
 win.resize(200,300) ;
 win.setVisible(true); button1 = new Button("计算圆形面积");
 button2 = new Button("计算四方形面积");
 add(button1);
 add(button2);
 button1.getMouseListeners();
 button2.getMouseListeners();//设置弹出对话框}
public void actionPerformed(ActionEvent e) {
 if(e.getSource() == button1){
 D = new Dialog(win,"圆形",true);//弹出Dialog
 D.setSize(80,80);
 D.add(new Label("面积= "+String.valueOf(area()))) ;
 D.show();
 }
 else {
 if(e.getSource() == button2){
 D1=new Dialog(win,"四方形",true);//弹出另一个Dialog
 D1.setSize(70,80);
 D1.add(new Label("面积= "+String.valueOf(area1()))) ;
 D1.show();
 }
 }
}
public static void main(String[] args){
 Frame1 f=new Frame1();
}
}

解决方案 »

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如果可以的话，为什么不用javax.swing的包呢？
我觉得这样的话简洁点。
public static void main(String[] args){
        Frame1 f=new Frame1();
       //少了这句
       f.setVisible(true);
}
使用javax.swing.JOptionPane.showMessage()简单很多，而且直接给button加mouseclick事件更直接明了
sxnucseven(No.7)你好,我在程序里是有定义Frame的,可能程序太乱不好看.那我的这个程序是那里不问题大家有没有发现出来啊!
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame1 extends JFrame  implements ActionListener{
  private static JFrame win;
  private JButton button1;
  private JButton button2;
  public double area(){
   int r=5;
   return r*r*3.14;
  }
public double area1(){
   int r=5;
   return r*r;
  }
public Frame1() {
  win=new JFrame("My window");//ÉèÖÃ´°Ìå
  setBackground(Color.white ) ;
  setSize(200,300) ;
  setDefaultCloseOperation(EXIT_ON_CLOSE);
  setVisible(true);
  JPanel jp=new JPanel();
  button1 = new JButton("¼ÆËãÔ²ÐÎÃæ»ý");
  button2 = new JButton("¼ÆËãËÄ·½ÐÎÃæ»ý");
  jp.add(button1);
  jp.add(button2);
  button1.addActionListener(this);
  button2.addActionListener(this);//ÉèÖÃµ¯³ö¶Ô»°
  Container c=getContentPane();
  c.add(jp);
  setContentPane(c);
}
public void actionPerformed(ActionEvent e) {
    if(e.getSource() == button1){
       JOptionPane.showMessageDialog
        (null,new JLabel("Ô²Ãæ»ý= "+String.valueOf(area())) );//µ¯³öDialog
      }
    else {
      if(e.getSource() == button2){
        JOptionPane.showMessageDialog
         (null,new JLabel("Õý·½ÐÎÃæ»ý= "+String.valueOf(area())));//µ¯³öÁíÒ»¸öDialog
       }
    }
}
public static void main(String[] args){
        Frame1 f=new Frame1();
}
}
*************************
呵呵，只会swing编程。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame1 extends JFrame  implements ActionListener{
  private static JFrame win;
  private JButton button1;
  private JButton button2;
  public double area(){
   int r=5;
   return r*r*3.14;
  }
public double area1(){
   int r=5;
   return r*r;
  }
public Frame1() {
  win=new JFrame("My window");
  setBackground(Color.white ) ;
  setSize(200,300) ;
  setDefaultCloseOperation(EXIT_ON_CLOSE);
  setVisible(true);
  JPanel jp=new JPanel();
  button1 = new JButton("area of circle");
  button2 = new JButton("area of squarel");
  jp.add(button1);
  jp.add(button2);
  button1.addActionListener(this);
  button2.addActionListener(this);
  Container c=getContentPane();
  c.add(jp);
  setContentPane(c);
}
public void actionPerformed(ActionEvent e) {
    if(e.getSource() == button1){
       JOptionPane.showMessageDialog
        (null,new JLabel("area of circle= "+String.valueOf(area())) );
      }
    else {
      if(e.getSource() == button2){
        JOptionPane.showMessageDialog
         (null,new JLabel("area of square = "+String.valueOf(area())));
       }
    }
}
public static void main(String[] args){
        Frame1 f=new Frame1();
}
}
**********************************************************
出现乱码，实在不好意思。
大家能不能伸出援助之手啊,不然我就挂掉了,问了好多人, But nobody know it.
button1.getMouseListeners();
button2.getMouseListeners();
我觉得是getMouseListeners() 这个方法不对
  应该用addActionListener()
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame1 extends JFrame  implements ActionListener{
  private static JFrame win;
  private JButton button1;
  private JButton button2;
  public double area(){
   int r=5;
   return r*r*3.14;
  }
public double area1(){
   int r=5;
   return r*r;
  }
public Frame1() {
   win=new JFrame("My window");
  setBackground(Color.white ) ;
  setSize(200,300) ;
  setDefaultCloseOperation(EXIT_ON_CLOSE);
  setVisible(true);
  JPanel jp=new JPanel();
  button1 = new JButton("area of circle");
  button2 = new JButton("area of squarel");
  jp.add(button1);
  jp.add(button2);
  button1.addActionListener(this);
  button2.addActionListener(this);
  Container c=getContentPane();
  c.add(jp);
  setContentPane(c);
}
public void actionPerformed(ActionEvent e) {
    if(e.getSource() == button1){
       JOptionPane.showMessageDialog
       (null,new JLabel("area of circle= "+String.valueOf(area())) );
      }
    else {
      if(e.getSource() == button2){
        JOptionPane.showMessageDialog
        (null,new JLabel("area of square = "+String.valueOf(area())));
       }
    }
}
public static void main(String[] args){
        Frame1 f=new Frame1();
}
}
**********************************************************
这个代码符合你的要求的啊，你运行一下就知道了。
lulin_19870207() 你好
我如果用addActionListener()这个会出现错误的,说什么不能Frame 里面运用.