JDialog窗体

在父窗体中调用对话框

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Demo extends JDialog{
	public Demo() {
		setBounds(200, 200, 100, 100);

		Container c = getContentPane();//创建容器
		c.add(new JLabel("我是对话框"));
	}
	
	public static void main(String[] args) {
		JFrame jf = new JFrame("父窗体");//创建父窗体
		jf.setVisible(true);//可见
		jf.setDefaultCloseOperation(EXIT_ON_CLOSE);
		jf.setBounds(200, 200, 300, 200);//设置坐标，大小
		
		Container c = jf.getContentPane();//设置容器
		c.setLayout(new FlowLayout());//设置布局，使用流布局
		JButton btn = new JButton("弹出对话框");//添加组件，按钮
		c.add(btn);//将组件添加到容器中
		
		btn.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent e) {//匿名内部类
				Demo d = new Demo();
				d.setVisible(true);//可见
			}
		});
	}
}

将父窗体阻塞

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class MyJDialog extends JDialog{
	private static final long serialVersionUID = 1L;
	public MyJDialog(MyFrame frame) {
		super(frame, "Hi", true);//初始化，进行阻塞
		setBounds(100, 100, 100, 100);
		Container c = getContentPane();
		c.add(new JLabel("我是对话框"));
	}
}

public class MyFrame extends JFrame{
	private static final long serialVersionUID = 1L;
	
	public static void main(String[] args) {
		new MyFrame();
	}
	
	public MyFrame() {
		setVisible(true);
		setBounds(200, 200, 300, 200);
		
		Container c = getContentPane();
		c.setLayout(new FlowLayout());//设置布局，使用流布局
		JButton btn = new JButton("弹出对话框");
		c.add(btn);
		
		btn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				new MyJDialog(MyFrame.this).setVisible(true);//调用对话框，可见
				
			}
		});
	}
}