高分求

Question

这个程序目前只实现了无论点哪个按钮都出现一张图片,怎么才能每点一个按钮都会对应出现一幅照片,??不是三个按钮的图片都相同..
package tuxing1;import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.io.IOException;import javax.imageio.ImageIO;
import javax.swing.*;
import java.io.*;
import javax.imageio.*;import com.sun.org.apache.bcel.internal.generic.RETURN;public class ButtonTest
{ public static void main(String[] args)
{
ButtonFrame  frame =new ButtonFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true); }}class ButtonFrame extends JFrame
{
public ButtonFrame()
{

setTitle("ButtonTest");
setSize(400,400);
ButtonPanel panel = new ButtonPanel();
add(panel);
}
}class ButtonPanel extends JPanel
{
public ButtonPanel()
{

JButton yellowButton =new JButton("Yellow");
JButton buleButton =new JButton("Blue");
JButton redButton =new JButton("read");
add(yellowButton);
add(buleButton);
add(redButton);
ColorAction yellowAction = new ColorAction("111");
ColorAction blueAction =new ColorAction("222");
ColorAction redAction =new ColorAction("333");
yellowButton.addActionListener(yellowAction);
buleButton.addActionListener(blueAction);
redButton.addActionListener(redAction);

}
public void paintComponent(Graphics g)
{
super.paintComponent(g);

}

private class ColorAction implements ActionListener
{
public ColorAction(String s)
{
    w=s;
   
}

public void actionPerformed(ActionEvent event)
{

JFrame frame=new JFrame();
    frame.setTitle(w);
    frame.setSize(300,200);
    frame.setVisible(true);
    
    ImagePanel panel = new ImagePanel();
frame.add(panel);
}
class ImagePanel extends JPanel
{

 ImagePanel()
{


try
{
image=ImageIO.read(new File("F:\\照片\\1.jpg"));

}

catch(IOException e)
{
e.printStackTrace();
}
}

public void paintComponent(Graphics g)
{
super.paintComponent(g);
if(image!=null)
    g.drawImage(image, 5, 0, getWidth(), getHeight(), 0, 0, 
image.getWidth(null), image.getHeight(null), null); 

}
}

}
  
private String w;
private Image image;
}

Answer 1

import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.io.IOException;import javax.imageio.ImageIO;
import javax.swing.*;
import java.io.*;
import javax.imageio.*;import com.sun.org.apache.bcel.internal.generic.RETURN;public class ButtonTest
{    public static void main(String[] args)
    {
        ButtonFrame frame = new ButtonFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }}
class ButtonFrame extends JFrame
{
    public ButtonFrame()
    {        setTitle("ButtonTest");
        setSize(400, 400);
        ButtonPanel panel = new ButtonPanel();
        add(panel);
    }
}
class ButtonPanel extends JPanel
{
    public ButtonPanel()
    {        JButton yellowButton = new JButton("Yellow");
        JButton buleButton = new JButton("Blue");
        JButton redButton = new JButton("read");
        add(yellowButton);
        add(buleButton);
        add(redButton);
        ColorAction yellowAction = new ColorAction("111");
        ColorAction blueAction = new ColorAction("222");
        ColorAction redAction = new ColorAction("333");
        yellowButton.addActionListener(yellowAction);
        buleButton.addActionListener(blueAction);
        redButton.addActionListener(redAction);
    }
    public void paintComponent(Graphics g)
    {
        super.paintComponent(g);    }    private class ColorAction implements ActionListener
    {
        public ColorAction(String s)
        {
            w = s;
        }
        public void actionPerformed(ActionEvent event)
        {            JFrame frame = new JFrame();
            frame.setTitle(w);
            frame.setSize(300, 200);
            frame.setVisible(true);
            ImagePanel panel = new ImagePanel(event.getActionCommand());
            frame.add(panel);
        }        class ImagePanel extends JPanel
        {
            ImagePanel()
            {
                image = null;
            }            ImagePanel(String buttonTag)
            {
                image = null;
                try
                {
                    if (buttonTag == "Yellow")
                    {
                        image = ImageIO.read(new File("d:\\1.jpg"));
                    }
                    else if (buttonTag == "Blue")
                    {
                        image = ImageIO.read(new File("d:\\2.jpg"));
                    }
                    else if (buttonTag == "read")
                    {
                        image = ImageIO.read(new File("d:\\2.jpg"));
                    }
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
            public void paintComponent(Graphics g)
            {
                super.paintComponent(g);
                if (image != null)
                    g.drawImage(image, 5, 0, getWidth(), getHeight(), 0, 0,
                        image.getWidth(null), image.getHeight(null), null);            }
        }    }    private String w;
    private Image image;
}

Answer 2

你的问题出在这个方法上:
public void actionPerformed(ActionEvent event) 
{ JFrame frame=new JFrame(); 
    frame.setTitle(w); 
    frame.setSize(300,200); 
    frame.setVisible(true); 
     
    ImagePanel panel = new ImagePanel(); 
    frame.add(panel); 
} 
 应该改为:
public void actionPerformed(ActionEvent event) 
{ 
  JFrame frame=new JFrame(); 
  frame.setTitle(w); 
  ImagePanel panel = new ImagePanel(); 
  frame.add(panel); //先把panel放到frame中
  frame.setSize(300,200); //再设置frame的属性
  frame.setVisible(true); 
} 

Answer 3

public void actionPerformed(ActionEvent event) 
{ JFrame frame=new JFrame(); 
    frame.setTitle(w); 
    frame.setSize(300,200); 
    frame.setVisible(true); 
     
    ImagePanel panel = new ImagePanel(); 
frame.add(panel); 
} 有几种方式,你把这个类放到  包含button类里,然后判断事件源 
if( event.getSource() = redButton) {}else if(..){}else{}
也可以像前面的人说的那样,每个button一个 action类

Answer 4

确实原理不是复杂，
一个按钮做一监听器放一个图片，不哦过在监听器里边触发的时候首先要清空那个lable中的图片，然后在现实你按钮的那个图片.