25---AWT和Swing(09)列表框(视频代码)

 

代码一：
 import javax.swing.JFrame ;
 import javax.swing.JList ;
 import java.util.Vector ;
 import javax.swing.BorderFactory ;
 import javax.swing.ListSelectionModel ;
 import javax.swing.JScrollPane ;
 import java.awt.Container ;
 import java.awt.GridLayout ;
 import java.awt.event.WindowAdapter ;
 import java.awt.event.WindowEvent ;
 class MyList{
  private JFrame frame = new JFrame("Welcome To MLDN") ;
  private Container cont = frame.getContentPane() ; // 得到窗体容器
  private JList list1 = null ;
  private JList list2 = null ;

  public MyList(){
   this.frame.setLayout(new GridLayout(1,3)) ; // 定义排版
   String nations[] = {"中国","巴西","美国","韩国","意大利","法国"} ;
   Vector<String> v = new Vector<String>() ;
   v.add("MLDN") ;
   v.add("MLDNJAVA") ;
   v.add("智囊团") ;
   this.list1 = new JList(nations) ;
   this.list2 = new JList(v) ;

   this.list1.setBorder(BorderFactory.createTitledBorder("你喜欢去那个国家旅游？")) ;
   this.list2.setBorder(BorderFactory.createTitledBorder("你喜欢网站？")) ;

   this.list1.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION) ;// 多选
   this.list2.setSelectionMode(ListSelectionModel.SINGLE_SELECTION) ;// 单选

   this.cont.add(new JScrollPane(this.list1)) ;
   this.cont.add(this.list2) ;

   this.frame.setSize(330,180) ;
   this.frame.setVisible(true) ;

 

   this.frame.addWindowListener(new WindowAdapter(){
    public void windowClosing(WindowEvent a){
     System.exit(1) ;
    }
   }) ;
  }

 }

 public class JListDemo01{
  public static void main(String args[]){
   new MyList() ;
  }
 }

代码二：
 import javax.swing.JFrame ;
 import javax.swing.JList ;
 import java.util.Vector ;
 import javax.swing.BorderFactory ;
 import javax.swing.ListSelectionModel ;
 import javax.swing.JScrollPane ;
 import javax.swing.AbstractListModel ;
 import java.awt.Container ;
 import java.awt.GridLayout ;
 import java.awt.event.WindowAdapter ;
 import java.awt.event.WindowEvent ;

 class MyListModel extends AbstractListModel{
  private String nations[] = {"中国","巴西","美国","韩国","意大利","法国"} ;
  public Object getElementAt(int index){
   if(index<this.nations.length){
    return this.nations[index] ;
   }else{
    return null ;
   }
  }
  public int getSize(){
   return this.nations.length ;
  }
 }

 class MyList{
  private JFrame frame = new JFrame("Welcome To MLDN") ;
  private Container cont = frame.getContentPane() ; // 得到窗体容器
  private JList list1 = null ;

  public MyList(){
   this.frame.setLayout(new GridLayout(1,3)) ; // 定义排版
   String nations[] = {"中国","巴西","美国","韩国","意大利","法国"} ;
   Vector<String> v = new Vector<String>() ;
   v.add("MLDN") ;
   v.add("MLDNJAVA") ;
   v.add("智囊团") ;
   this.list1 = new JList(new MyListModel()) ;

   this.list1.setBorder(BorderFactory.createTitledBorder("你喜欢去那个国家旅游？")) ;

   this.list1.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION) ;// 多选

   this.cont.add(new JScrollPane(this.list1)) ;

   this.frame.setSize(330,180) ;
   this.frame.setVisible(true) ;

 

   this.frame.addWindowListener(new WindowAdapter(){
    public void windowClosing(WindowEvent a){
     System.exit(1) ;
    }
   }) ;
  }

 }

 public class JListDemo02{
  public static void main(String args[]){
   new MyList() ;
  }
 }

代码三:
 import javax.swing.JFrame ;
 import javax.swing.JList ;
 import java.util.Vector ;
 import javax.swing.BorderFactory ;
 import javax.swing.ListSelectionModel ;
 import javax.swing.JScrollPane ;
 import javax.swing.AbstractListModel ;
 import java.awt.Container ;
 import java.awt.GridLayout ;
 import java.awt.event.WindowAdapter ;
 import java.awt.event.WindowEvent ;
 import javax.swing.event.ListSelectionListener ;
 import javax.swing.event.ListSelectionEvent ;

 class MyListModel extends AbstractListModel{
  private String nations[] = {"中国","巴西","美国","韩国","意大利","法国"} ;
  public Object getElementAt(int index){
   if(index<this.nations.length){
    return this.nations[index] ;
   }else{
    return null ;
   }
  }
  public int getSize(){
   return this.nations.length ;
  }
 }

 class MyList implements ListSelectionListener{
  private JFrame frame = new JFrame("Welcome To MLDN") ;
  private Container cont = frame.getContentPane() ; // 得到窗体容器
  private JList list1 = null ;

  public MyList(){
   this.frame.setLayout(new GridLayout(1,3)) ; // 定义排版
   String nations[] = {"中国","巴西","美国","韩国","意大利","法国"} ;
   Vector<String> v = new Vector<String>() ;
   v.add("MLDN") ;
   v.add("MLDNJAVA") ;
   v.add("智囊团") ;
   this.list1 = new JList(new MyListModel()) ;

   this.list1.setBorder(BorderFactory.createTitledBorder("你喜欢去那个国家旅游？")) ;

   this.list1.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION) ;// 多选

   this.cont.add(new JScrollPane(this.list1)) ;

   this.frame.setSize(330,180) ;
   this.frame.setVisible(true) ;
   this.list1.addListSelectionListener(this) ;

   this.frame.addWindowListener(new WindowAdapter(){
    public void windowClosing(WindowEvent a){
     System.exit(1) ;
    }
   }) ;
  }

  public void valueChanged(ListSelectionEvent e){ // 事件处理
   int temp[] = list1.getSelectedIndices() ;
   System.out.print("选定的内容：") ;
   for(int i=0;i<temp.length;i++){
    System.out.print(list1.getModel().getElementAt(i) + "、") ;
   }
   System.out.println() ;
  }

 }

 public class JListDemo03{
  public static void main(String args[]){
   new MyList() ;
  }
 }