Java awt-对话框简单实现方式

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class dia
{
	public static void main(String args[])
	{
		JButton btn1=new JButton("modal");
		JButton btn2=new JButton("unmodal");
		JFrame f=new JFrame("DIaloDemo");
		f.setSize(300,400);
		f.setLocation(300,200);
		f.setLayout(new FlowLayout());
		f.add(btn1);
		f.add(btn2);
		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		f.setVisible(true);
 
		final JLabel label=new JLabel();
		final JDialog dialog=new JDialog(f,"Dialog");
		dialog.setSize(220,150);
		dialog.setLocation(350,250);
		dialog.setLayout(new FlowLayout()); 
		final JButton btn3=new JButton("sure");
		dialog.add(btn3);
		
		btn1.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				dialog.setModal(true);
				if(dialog.getComponents().length==1){
					dialog.add(label);
				}
				label.setText("modal dialog,click to close");
				dialog.setVisible(true);
			}
		});
 
		
		btn2.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				dialog.setModal(false);
				if(dialog.getComponents().length==1){
					dialog.add(label);
				}
				label.setText("unmodal dialog,click to close");
				dialog.setVisible(true);
			}
		});
 
		
		btn3.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				dialog.dispose();
			}
		}); 
	}
}

/**
 * 程序示范了模式对话框和非模式对话框的用法
 */
package codes11; 
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class DialogTest { 
	Frame f = new Frame("测试");
	Dialog d1 = new Dialog(f, "模式对话框", true);
	Dialog d2 = new Dialog(f, "非模式对话框", false);
	Button b1 = new Button("打开模式对话框");
	Button b2 = new Button("打开非模式对话框");
 
	public void init() {
		d1.setBounds(20, 30, 300, 400);
		d2.setBounds(20, 30, 300, 400);
		b1.addActionListener(new ActionListener() {
 
			@Override
			public void actionPerformed(ActionEvent arg0) {
				d1.setVisible(true);
			}
		});
		b2.addActionListener(new ActionListener() {
 
			@Override
			public void actionPerformed(ActionEvent arg0) {
				d2.setVisible(true);
			}
		});
		f.add(b1);
		f.add(b2, BorderLayout.SOUTH);
		f.pack();
		f.setVisible(true);
	}
 
	public static void main(String[] args) {
		new DialogTest().init();
	} 
}

package codes11; 
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.FileDialog;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class FileDialogTest { 
	Frame f = new Frame("Test");
	FileDialog d1 = new FileDialog(f, "选择需要打开的文件", FileDialog.LOAD);
	FileDialog d2 = new FileDialog(f, "选择需要保存文件的路径", FileDialog.SAVE);
	Button b1 = new Button("打开文件");
	Button b2 = new Button("保存文件");
 
	public void init() {
		b1.addActionListener(new ActionListener() { 
			@Override
			public void actionPerformed(ActionEvent arg0) {
				d1.setVisible(true);
				System.out.println(d1.getDirectory() + d1.getFile());
			}
		});
		b2.addActionListener(new ActionListener() {
 
			@Override
			public void actionPerformed(ActionEvent arg0) {
				d2.setVisible(true);
				System.out.println(d2.getDirectory() + d2.getFile());
			}
		});
		f.add(b1);
		f.add(b2, BorderLayout.SOUTH);
		f.pack();
		f.setVisible(true);
	}
 
	public static void main(String[] args) {
		new FileDialogTest().init();
	} 
}