demofilechooserdialog.java

java绘图 java awt 经典绘图的例子,对于初学awt模块的人非常有帮助.

/*
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 */

package swing;

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.filechooser.FileFilter;

/**
 *
 * @author zhaolin
 */
public class DemoFileChooserDialog extends JFrame{
    private JFileChooser jfc;
    public DemoFileChooserDialog(){
        jfc = new JFileChooser();
        jfc.setFileFilter(new FileFilter(){

            @Override
            public boolean accept(File f) {
                if(f.isDirectory())
                    return true;
                if(f.getName().endsWith(".jpg")){
                    return true;
                }
                return false;
            }

            @Override
            public String getDescription() {
                return "jpg";
            }
            
        });
        jfc.setAcceptAllFileFilterUsed(false);
        Container c = this.getContentPane();
        c.setLayout(new FlowLayout());
        JButton open = new JButton("打开");
        JButton save = new JButton("保存");
        c.add(open );
        c.add(save);
        
        open.addActionListener(new ActionListener(){

            public void actionPerformed(ActionEvent e) {
                int status = jfc.showOpenDialog(DemoFileChooserDialog.this);
                if(status == JFileChooser.APPROVE_OPTION){
                    File file = jfc.getSelectedFile();
                    System.out.println("Open file "+file.getName());
                }
            }
        
        });
        save.addActionListener(new ActionListener(){

            public void actionPerformed(ActionEvent e) {
                int status = jfc.showSaveDialog(DemoFileChooserDialog.this);
                if(status == JFileChooser.APPROVE_OPTION){
                    File file = jfc.getSelectedFile();
                    System.out.println("Open file "+file.getName());
                }
            }
        
        });
        this.pack();
        this.setVisible(true);
    }
    
    public static void main(String[] args) {
        new DemoFileChooserDialog();
    }

    
    
}