2019cc3f9b69001c13ed8b3512c9cbf6

这是我自己照着书上敲的

/*
 * Created on 2007-9-23
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
/**
 * @author Administrator
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class GridBagLayoutDemo extends Applet
{
    public void init()
    {
        this.setBackground(Color.gray);
        add(new ChatPanel());
    }
}
class ChatPanel extends Panel
{
    TextArea mainText;
    TextField input;
    Button sendButton,disconnectButton,connectButton;
    Checkbox secretCheck;
    Choice objChoice;
    public ChatPanel()
    {
        mainText=new TextArea("",10,15);
        input=new TextField("",40);
        sendButton=new Button("发送");
        disconnectButton=new Button("断开连接");
        connectButton=new Button("连接主机");
        secretCheck=new Checkbox("密谈");
        objChoice=new Choice();
        GridBagLayout layout=new GridBagLayout();
        GridBagConstraints gbc=new GridBagConstraints();
        this.setLayout(layout);
        this.setBackground(Color.lightGray);
        gbc.anchor=GridBagConstraints.NORTHWEST;
        gbc.fill=GridBagConstraints.BOTH;
        gbc.gridheight=6;
        gbc.gridwidth=6;
        gbc.insets=new Insets(5,5,5,5);
        gbc.weightx=1;
        add(mainText,gbc);
        gbc.fill=GridBagConstraints.HORIZONTAL;
        gbc.gridheight=1;
        gbc.gridwidth=1;
        gbc.ipadx=10;
        gbc.ipady=3;
        gbc.gridx=5;
        gbc.gridy=GridBagConstraints.RELATIVE;
        add(connectButton,gbc);
        //gbc.gridheight=GridBagConstraints.REMAINDER;
        add(disconnectButton,gbc);
        gbc.gridx=1;
        gbc.gridy=7;
        add(new Label("你对",Label.LEFT),gbc);
        gbc.gridx=GridBagConstraints.RELATIVE;
        add(objChoice,gbc);
        add(new Label("说",Label.LEFT),gbc);
        add(secretCheck,gbc);
        gbc.gridx=1;
        gbc.gridy=8;
        gbc.gridwidth=4;
        add(input,gbc);
        gbc.gridx=GridBagConstraints.RELATIVE;
        add(sendButton,gbc);
    }
}