myframe3.java~52~

简单的代码

package xue;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;


public class MyFrame3 extends Frame implements ItemListener{
    Choice km;
    TextField tf3;
    MyFrame3(){
        super("图书馆馆藏记录");
        setSize(600,400);
        setLocation(200,200);
        setBackground(Color.pink);
        this.setVisible(true);

    }
    /*public static void main(String[] args){
        MyFrame mf3=new MyFrame();
         mf3.setTitle("图书馆馆藏记录");
         new MyFrame3().init3();
         mf3.setVisible(true);
        mf3.addWindowListener(new WindowAdapter() {
                public void windowClosing(WindowEvent e) {
                    System.exit(0);
                }
            });

    }*/
    public void init3(){
        setLayout(new BorderLayout());
        Panel p1=new Panel();
        tf3=new TextField();
        km=new Choice();
        km.add("分类查询");
        km.add("计算机");
        km.add("经济");
        km.add("生物");
        km.add("化学");
        km.add("外语");
        km.add("地理");
        km.add("教育");
        km.add("音乐");
        this.add(p1,BorderLayout.NORTH);
        p1.setLayout(new GridLayout(1,2,0,0));
        p1.add(km);
        p1.add(tf3);
        //this.add(table);
    }

    public void itemStateChanged(ItemEvent e){
        char ch=e.getItemSelectable().toString().charAt(0);
        switch (ch){
        case '计':break;
        case '经':break;
        case '生':break;
        case '化':break;
        case '外':break;
        case '地':break;
        case '教':break;
        case '音':break;

        }

    }
}