filedialogexample.java

JAVA SE6 全方位学习 朱仲杰 编著 机械工业出版社出版

import java.awt.*;
import java.awt.event.*;

public class FileDialogExample implements ActionListener
{
	Frame f;
	FileDialog fd;
	Checkbox chLoad, chSave;
	CheckboxGroup cg;
	Button b;
	Label lbDir, lbFile;
	
	public static void main(String arv[])
	{
		new FileDialogExample();
	}
	
	public FileDialogExample()
	{
		f = new Frame("FileDialog Example");
		fd = new FileDialog(f);
		
		cg = new CheckboxGroup();
		chLoad = new Checkbox("LOAD", true, cg);
		chSave = new Checkbox("SAVE", false, cg);
		
		Panel p1 = new Panel();
		p1.add(chLoad);
		p1.add(chSave);
		
		lbDir = new Label("Directory: ");
		lbFile = new Label("File Name: ");
		
		Panel p2 = new Panel(new GridLayout(2,1));
		p2.add(lbDir);
		p2.add(lbFile);
		
		b = new Button("Show");
		b.addActionListener(this);
		
		f.add(p1, BorderLayout.NORTH);
		f.add(p2, BorderLayout.CENTER);
		f.add(b, BorderLayout.SOUTH);
		f.pack();
		f.setVisible(true);
	}

	public void actionPerformed(ActionEvent e)
	{
		if (chLoad.getState())
			fd.setMode(FileDialog.LOAD);
		else
			fd.setMode(FileDialog.SAVE);
		
		fd.show();
		
		lbDir.setText("Directory: "+fd.getDirectory());
		lbFile.setText("File Name: "+fd.getFile());
		f.pack();
	}
}