subframe.java

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package dd;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SubFrame extends JDialog
                      implements ActionListener
{
	private MainFrame mmf;
	
	private JTextField txtName;
	private JButton btnOk;
	
	public SubFrame(MainFrame mf)
	{
		super(mf, true);
		mmf = mf;
		
		txtName = new JTextField();
		btnOk = new JButton("确定");
		
		java.awt.Container cp = this.getContentPane();
		cp.add(txtName, BorderLayout.NORTH);
		cp.add(btnOk, BorderLayout.SOUTH);
		
		btnOk.addActionListener(this);
		
		this.setTitle("Sub Frame");
		this.setSize(300, 200);
		this.setVisible(true);
	}
	
	public void actionPerformed(ActionEvent ae)
	{
		String strName = txtName.getText();
		mmf.displayName(strName);
		this.dispose();//释放窗体
	}
}