tabpane1.java

刘艺编著的java教程的课本习题加例题代码 很有用哦！

package tabpanl;

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

public class TabPane1 extends JFrame {
  JPanel cp=new JPanel();
  JTabbedPane jtp=new JTabbedPane();  //定义分页面板对象 
  JPanel jp1=new JPanel();            //定义面板对象，作为分页使用
  JPanel jp2=new JPanel();
  JPanel jp3=new JPanel();
  JButton jb1=new JButton("in one");   //定义按钮in one
  JButton jb2=new JButton("in two");   //定义按钮in two
  public TabPane1() {                //窗口tabpane1类的构造函数
  setTitle("try to use JTabbedPane");     //设置窗口标题
  setSize(200,300);                   //设置窗口大小
  this.addWindowListener(new WindowAdapter() { //监听窗口的 
   public void  windowClosing(WindowEvent e){
    System.exit(0);
    }
  });
  cp=(JPanel)this.getContentPane();            //取得tabpane1类的容器框架
  ImageIcon icon=new ImageIcon("middle.gif");  //定义图标
  jp1.setLayout(new FlowLayout());            //设置面板jp1的布局
  jp1.add(jb1);                    //在面板jp1中加入按钮in one
  jp2.setLayout(new FlowLayout());   //设置面板jp2的布局
  jp2.add(jb2);                    //在面板jp1中加入按钮in two
  jtp.add(jp1,0);          //在分页面板中加入面板jp1,且将其编号设为0
  jtp.setTitleAt(0,"one");   //将0号分页的标签名设为one
          jtp.addTab("two",icon,jp2,"hello"); 
//加入标签名为two、图标为icon、提示信息为hello的分页jp2
  jtp.setSelectedIndex(0);  //设置0号分页为当前页
  jtp.addChangeListener(new ChangeListener(){ //监听分页面板jtp的ChangeEvent
    public void stateChanged(ChangeEvent e) {
     jtpState(e);   //调用方法jtpState(ChangeEvent e)，用以处理ChangeEvent
    }
  });
  cp.add(jtp);   //将分页面板加入tabpane1类的容器框架
  }
  public static void main(String[] args) {
    TabPane1 tabpane2 = new TabPane1();  //定义类tabpane1的对象tabpane2
    tabpane2.setVisible(true);         //将窗口对象tabpane2设为显示
  }
  void jtpState (ChangeEvent e) {     //处理ChangEvent事件的方法
   String s=new String();
   jp3=(JPanel)jtp.getSelectedComponent(); //取得被选分页
   if ( jp3==jp1 ) s="one";      //若选择jp1则s取值为one
   if ( jp3==jp2 ) s="two";      //若选择jp2则s取值为two
   this.setTitle(s+" is selected");  //设置窗口标题
  }
}