java 窗体交互问题谢谢

Question

Frame 和Panel各一个
现把new Frame().add(new Panel())后
如何在Panel中传递参数给Frame?
刚看java谢谢赐教

Answer 1

如果你的这个frame中有一个方法为void　setName(String name)，　那在你的Panel的代码中直接使用frame.setName("Hello");　就是一简单的方法调用，　面向对象中的所谓传消息，　实际上说白了就是函数调用．

Answer 2

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class TestArgs {
        public static void main(String[] args)
        {
                ArgsFrame frame=new ArgsFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
        }
}
class ArgsFrame extends JFrame
{
        public ArgsFrame()
        {
                setTitle("Test Args");
                setSize(300,200);
                ArgsPanel panel=new ArgsPanel();
                add(panel,BorderLayout.SOUTH);
        }
        public static String GetString(String s)
        {
                return s + " is returned";
        }
}
class ArgsPanel extends JPanel
{
        public ArgsPanel()
        {
                JButton button=new JButton("Button1");
                button.addActionListener(
                new ActionListener()
                {
                        public void actionPerformed(ActionEvent event)
                        {
                                System.out.println((new ArgsFrame()).GetString("Panel"));
                        }
                }
                );
                add(button);
                
        }
}