class MyJDialog extends JDialog{
public MyJDialog(JFrame frame){
super(frame,"第一个Dialog窗体",true);
Container container=getContentPane();
container.add(new JLabel("这是一个对话框"));
setBounds(120, 120, 100, 100);
}
}
public class MyFrame extends JFrame{
public static void main(String[] args) {
new MyFrame();
}
public MyFrame()
{
JFrame jf=new JFrame("JFrame窗体");
Container container=jf.getContentPane();
container.setLayout(null);
JLabel ji=new JLabel("这是一个JFrame窗体");
//将标签的文字至于标签中间
ji.setHorizontalAlignment(SwingConstants.CENTER);
container.add(ji);
JButton bl=new JButton("弹出对话框");
bl.setBackground(Color.blue);
bl.setBounds(10, 10, 100, 21);
bl.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
new MyJDialog(MyFrame.this).setVisible(true);
}
});
container.add(bl);
jf.setVisible(true);
jf.setSize(200,150);
jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
}