Java 入门图形用户界面设计之列表框JList

目录

• 列表框JList
• 使用ListModel构造JList
• JList事件处理

import javax.swing.*;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Vector;

class MyList{
    private JFrame frame = new JFrame("一");
    private Container cont = frame.getContentPane();
    private JList list1 = null;
    private JList list2 = null;
    public MyList(){
        this.frame.setLayout(new GridLayout(1,3));
        String n[] = {"A","B","C","D","E","F"};
        Vector<String> v = new Vector<String>();
        v.add("A");
        v.add("B");
        v.add("C");
        this.list1 = new JList(n);
        this.list2 = new JList(v);
        list1.setBorder(BorderFactory.createTitledBorder("请选择"));
        list2.setBorder(BorderFactory.createTitledBorder("请选择"));
        list1.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        list2.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        cont.add(this.list1);
        cont.add(this.list2);
        this.frame.setSize(300,200);
        this.frame.setVisible(true);
        this.frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                super.windowClosing(e);
                System.exit(1);
            }
        });
    }
}
public class Hello {
    public static void main(String[] args) {
        new MyList();
    }
}

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

class MyListModel extends AbstractListModel{
    private String n[]={"A","B","C","D"};

    @Override
    public int getSize() {
        return this.n.length;
    }

    public Object getElementAt(int ind){
        if(ind<this.n.length){
            return this.n[ind];
        }else {
            return null;
        }
    }
}
class MyList{
    private JFrame frame = new JFrame("一");
    private Container cont = frame.getContentPane();
    private JList list1 =null;
    public MyList(){
        this.list1 = new JList(new MyListModel());
        list1.setBorder(BorderFactory.createTitledBorder("请选择"));
        list1.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        cont.add(this.list1);
        this.frame.setSize(300,200);
        this.frame.setVisible(true);
        this.frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                super.windowClosing(e);
                System.exit(1);
            }
        });
    }
}
public class Hello {
    public static void main(String[] args) {
        new MyList();
    }
}