GUI编程及文件对话框的使用

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.JLabel;

@SuppressWarnings("serial")
public class Filechooser extends JFrame implements ActionListener{

	JButton open=null;
	public static void main (String[] args){
		new Filechooser();//构造一个指向用户的默认目录Filechooser
	}
	public Filechooser(){
		open=new JButton("打开");
		this.add(open);
		this.setBounds(100,100,100,100);
		this.setVisible(true);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		open.addActionListener(this);
	}
	public void actionPerformed(ActionEvent e){
		JFileChooser j=new JFileChooser();
		j.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);//设置Filechooser
		j.showDialog(new JLabel(),"选择");// 弹出具有自己定义 approve button的自己定义文件选择器对话框
		File file=j.getSelectedFile();
			if(file.isDirectory()){
				System.out.println("目录        "+file.getAbsolutePath());

			}else if(file.isFile()){
				System.out.println("目录        "+file.getAbsolutePath());
			}
			System.out.println(j.getSelectedFile().getName());

	}
}

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