Java编程——单词排序

//WordSort.java
package javaapplication3;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.*;
import javax.swing.text.Document;

public class WordSort extends JFrame implements DocumentListener,ActionListener{
    JTextArea text1,text2;
    JButton buttonClear;
    WordSort(){
        setBounds(100,100,350,300);
        setVisible(true);
        validate();
        
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        text1=new JTextArea(20,15);
        text2=new JTextArea(20,15);
        buttonClear=new JButton("清空");
        text1.setLineWrap(true);
        text1.setWrapStyleWord(true);
        text2.setLineWrap(true);
        text2.setWrapStyleWord(true);
        add(text1);
        add(text2);
        add(buttonClear);
        text2.setEditable(false);
        Box box1=Box.createHorizontalBox();
        Box box2=Box.createHorizontalBox();
        box1.add(new JLabel("请输入单词："));
        box1.add(new JScrollPane(text1));
        box2.add(new JLabel("排序后的单词序列："));
        box2.add(new JScrollPane(text2));
        Box box3=Box.createHorizontalBox();
        box3.add(box1);
        box3.add(box2);
        Container con=getContentPane();
        con.add(box3,BorderLayout.SOUTH);
        con.validate();
        text1.getDocument().addDocumentListener(this);
        
        buttonClear.addActionListener(this);
    }
    public void insertUpdate(DocumentEvent e){
        handle();
    }
    public void removeUpdate(DocumentEvent e){
        handle();
    }
    public void changedUpdate(DocumentEvent e){
        handle();
    }
    public void handle(){
        String s=text1.getText();
        StringTokenizer fenxi=new StringTokenizer(s,",\n");
        int n=fenxi.countTokens();
        String a[]=new String[n];
        for(int i=0;i<=n-1;i++){
            String temp=fenxi.nextToken();
            a[i]=temp;
        }
        Arrays.sort(a);
        text2.setText(null);
        for(int i=0;i<n;i++){
            text2.append(a[i]+"\n");
        }        
    }
    public void actionPerformed(ActionEvent e){
        text1.setText(null);}
    public static void main(String args[]){
        WordSort win=new WordSort();
    }
    }