Java——列表框：JList

2022-11-06 15:18:32

import java.awt.Container;

import java.awt.GridLayout;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.util.Vector;

import javax.swing.BorderFactory;

import javax.swing.JFrame;

import javax.swing.JList;

import javax.swing.JRadioButton;

import javax.swing.ListSelectionModel;

//=================================================

// File Name       :	JList_demo

//------------------------------------------------------------------------------

// Author          :	Common

//类名：MyList

//属性：

//方法：

class MyList{

	private JFrame frame = new JFrame("窗体");					//定义窗体

	private Container cont = frame.getContentPane();			//得到窗体容器

	private JList list1  = null;															//定义列表框

	private JList list2  = null;															//定义列表框

	public MyList(){

		this.frame.setLayout(new GridLayout(1,3));					//定义排版，1行2列

		String nations[] = {"中国","美国","韩国","法国","英国"};

		Vector<String> v = new Vector<String>();						//定义一个Vector集合

		v.add("Vector1");

		v.add("Vector2");

		v.add("Vector3");

		this.list1 = new JList(nations);					//实例化JList

		this.list2 = new JList(v);								//实例化JList

		//定义一个列表框的边框显示条

		list1.setBorder(BorderFactory.createTitledBorder("哪个国家？"));

		list2.setBorder(BorderFactory.createTitledBorder("Vector?"));

		//第一个列表框一次可以选择多个选项

		list1.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);

		//第二个列表框每次可以选择一个选项

		list2.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

		cont.add(this.list1);					//加入面板

		cont.add(this.list2);					//加入面板

		this.frame.setSize(330,200);

		this.frame.setVisible(true);

		this.frame.addWindowListener(new WindowAdapter(){

			public void windowClosing(WindowEvent e) {			//窗口关闭时触发，按下关闭按钮

			// TODO 自动生成的方法存根

			System.out.println("windowClosing-->窗口关闭");

			System.exit(1);

			}

		});

	}

}

//主类

//Function        : 	JList_demo

public class JList_demo {

	public static void main(String[] args) {

		// TODO 自动生成的方法存根

		new MyList();

	}

}

import java.awt.Container;

import java.awt.GridLayout;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.util.Vector;

import javax.swing.AbstractListModel;

import javax.swing.BorderFactory;

import javax.swing.JFrame;

import javax.swing.JList;

import javax.swing.ListSelectionModel;

//=================================================

// File Name       :	JModel_demo

//------------------------------------------------------------------------------

// Author          :	Common

//类名：MyListModel

//属性：

//方法：

class MyListModel extends AbstractListModel{

	private String nations[] = {"中国","美国","韩国","法国","英国"};

	@Override

	public int getSize() {

		// TODO 自动生成的方法存根

		return this.nations.length;

	}

	@Override

	public Object getElementAt(int index) {		//返回指定标号的元素

		// TODO 自动生成的方法存根

		if(index<this.nations.length){

			return this.nations[index];

		}else{

			return null;

		}

	}

}

//类名：MyList

//属性：

//方法：

class myList{

	private JFrame frame = new JFrame("窗体");					//定义窗体

	private Container cont = frame.getContentPane();			//得到窗体容器

	private JList list1  = null;															//定义列表框

	private JList list2  = null;															//定义列表框

	public myList(){

		this.list1 = new JList(new MyListModel());

		this.list2 = new JList(new MyListModel());

		//定义一个列表框的边框显示条

		list1.setBorder(BorderFactory.createTitledBorder("哪个国家？"));

		list2.setBorder(BorderFactory.createTitledBorder("Vector?"));

		//第一个列表框一次可以选择多个选项

		list1.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);

		//第二个列表框每次可以选择一个选项

		list2.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

		cont.add(this.list1);					//加入面板

		cont.add(this.list2);					//加入面板

		this.frame.setSize(330,200);

		this.frame.setVisible(true);

		this.frame.addWindowListener(new WindowAdapter(){

			public void windowClosing(WindowEvent e) {			//窗口关闭时触发，按下关闭按钮

			// TODO 自动生成的方法存根

			System.out.println("windowClosing-->窗口关闭");

			System.exit(1);

			}

		});

	}

}

//主类

//Function        : 	JModel_demo

public class JModel_demo {

	public static void main(String[] args) {

		// TODO 自动生成的方法存根

		new MyList();

	}

}

监听只能加一个

import java.awt.Container;

import java.awt.GridLayout;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.util.Vector;

import javax.swing.AbstractListModel;

import javax.swing.BorderFactory;

import javax.swing.JFrame;

import javax.swing.JList;

import javax.swing.JScrollPane;

import javax.swing.ListSelectionModel;

import javax.swing.event.ListSelectionEvent;

import javax.swing.event.ListSelectionListener;

//=================================================

// File Name       :	JModel_demo

//------------------------------------------------------------------------------

// Author          :	Common

//类名：MyListModel

//属性：

//方法：

class MyListModel extends AbstractListModel{

	private String nations[] = {"中国","美国","韩国","法国","英国"};

	@Override

	public int getSize() {

		// TODO 自动生成的方法存根

		return this.nations.length;

	}

	@Override

	public Object getElementAt(int index) {		//返回指定标号的元素

		// TODO 自动生成的方法存根

		if(index<this.nations.length){

			return this.nations[index];

		}else{

			return null;

		}

	}

}

//类名：MyList

//属性：

//方法：

class myList implements ListSelectionListener{

	private JFrame frame = new JFrame("窗体");					//定义窗体

	private Container cont = frame.getContentPane();			//得到窗体容器

	private JList list1  = null;															//定义列表框

//	private JList list2  = null;															//定义列表框

	public myList(){

		this.list1 = new JList(new MyListModel());

//		this.list2 = new JList(new MyListModel());

		//定义一个列表框的边框显示条

		list1.setBorder(BorderFactory.createTitledBorder("哪个国家？"));

//		list2.setBorder(BorderFactory.createTitledBorder("Vector?"));

		//第一个列表框一次可以选择多个选项

		list1.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);

		//第二个列表框每次可以选择一个选项

//		list2.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

		list1.addListSelectionListener(this); 			//加入事件监听

//		list2.addListSelectionListener(this); 			//加入事件监听

		cont.add(new JScrollPane(this.list1));			//加入滚动条

		cont.add(this.list1);					//加入面板

//		cont.add(this.list2);					//加入面板

		this.frame.setSize(330,200);

		this.frame.setVisible(true);

		this.frame.addWindowListener(new WindowAdapter(){	//加入事件监听

			public void windowClosing(WindowEvent arg0) {			//窗口关闭时触发，按下关闭按钮

			// TODO 自动生成的方法存根

			System.out.println("windowClosing-->窗口关闭");

			System.exit(1);

			}

		});

	}

	public void valueChanged(ListSelectionEvent e) {

		// TODO 自动生成的方法存根

		int temp[] = list1.getSelectedIndices();				//取得全部选定

		System.out.println("选定的内容：");

		for(int i=0;i<temp.length;i++){

			System.out.println(list1.getModel().getElementAt(i)+"、");

		}

	}

}

//主类

//Function        : 	JModel_demo

public class JModel_demo {

	public static void main(String[] args) {

		// TODO 自动生成的方法存根

		new myList();

	}

}

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