未完成

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class BeiJing extends Applet
{
Panel panenl1=new Panel();
TextArea textArea1=new TextArea();
Label label1=new Label("我是北京，向上海发消息：");
TextField textField1=new TextField();
Button button1=new Button("发送");
GridLayout gridLayout1=new GridLayout();
Panel panel2=new Panel();
TextArea textArea=new TextArea();
Label label2=new Label("我是上海，向北京发消息：");
TextField textField2=new TextField();
Button button2=new Button("发送");
GridLayout gridLayout2=new GridLayout();
public void init()
{
this.setLayout(gridLayout1);
textArea1.setColumns(20);
textArea1.setRows(1);
textArea1.setText("从上海收到的消息：\n");
button1.addActionListener(new java.awt.event.ActionListener()
{public void actionPerformed(ActionEvent e)
{button1_actionPerformed(e);}});

}
}