简单的 java图片浏览器示例详解编程语言

import java.awt.*; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.image.CropImageFilter; 
import java.awt.image.FilteredImageSource; 
import java.awt.image.ImageFilter; 
import java.awt.image.ImageProducer; 
import java.io.File; 
import javax.swing.*; 
public class vicePic implements ActionListener { 
    JLabel imgLable; 
    JFrame mainJframe; 
    Container con; 
    JTextField fileFiled; 
    JButton openBtn,cutBtn; 
    JPanel pane; 
    JScrollPane spanel; 
    ImageIcon img; 
    public vicePic(){ 
        mainJframe=new JFrame("图形显示比例"); 
        con=mainJframe.getContentPane(); 
        pane=new JPanel(); 
        pane.setLayout(new FlowLayout()); 
        openBtn=new JButton("打开文件"); 
        openBtn.addActionListener(this); 
        cutBtn=new JButton("剪切图片"); 
        cutBtn.addActionListener(this); 
        fileFiled=new JTextField(); 
        fileFiled.setColumns(20); 
        pane.add(fileFiled); 
        pane.add(openBtn); 
        pane.add(cutBtn); 
        imgLable =new JLabel(); 
        spanel=new JScrollPane(imgLable); 
        con.add(pane,BorderLayout.NORTH); 
        con.add(spanel,BorderLayout.CENTER); 
        mainJframe.setSize(800, 800); 
        mainJframe.setVisible(true); 
        mainJframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 
        } 
    @Override 
    public void actionPerformed(ActionEvent e) { 
        String cmd=e.getActionCommand(); 
        ImageFilter cropFilter; 
        Image croppedImage; 
        ImageProducer produer; 
        if(cmd.equals("打开文件")){ 
        try{ 
            JFileChooser chooser=new JFileChooser(); 
            if(chooser.showOpenDialog(mainJframe)==JFileChooser.APPROVE_OPTION){ 
                File tempfile=chooser.getSelectedFile(); 
                fileFiled.setText(tempfile.toString()); 
                img=new ImageIcon(fileFiled.getText()); 
                imgLable.setIcon(img);       
                }http://www.huiyi8.com/jiaoben/ 
        }catch(Exception el){ 
            JOptionPane.showMessageDialog(mainJframe, "图品无法显示"); 
 
        } 
        } 
        if(cmd.equals("剪切图片")){ 
            cropFilter=new CropImageFilter(100, 100, 200, 200); 
            produer=new FilteredImageSource(img.getImage().getSource(), cropFilter); 
            croppedImage=Toolkit.getDefaultToolkit().createImage(produer); 
            imgLable.setIcon(new ImageIcon(croppedImage)); 
            } 
    } 
    public static void main(String[] args){ 
        new vicePic(); 
    } 
 
}