eclipse中array.sort(a);无法进行排序

Question

import java.awt.*;
import java.awt.event.*;
import java.util.*;
class WindowTextArea extends Frame implements TextListener,ActionListener
{
TextArea text1,text2;
Button buttonClear;
WindowTextArea()
{
setLayout(new FlowLayout());

    text1 = new TextArea(6,15);
    text2 = new TextArea(6,15);
    text2.setEditable(false);
    buttonClear = new Button("确定");

    add(text1);
    add(text2);
    add(buttonClear);

    text1.addTextListener(this);
    buttonClear.addActionListener(this);

    setBounds(100,100,350,160);
    setVisible(true);
    validate();

    addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                System.exit(0);
            }
        });
}
public void textValueChanged(TextEvent e)
{
    String s = text1.getText();
    String a[]  = s.split("\\s+");
    Arrays.sort(a);
    text2.setText("");
    for(int i = 0; i < a.length; i++)
        {
            text2.append(a[i]+"\n");
        }
}

public void actionPerformed(ActionEvent e)
{
    text1.setText("");
}

}

public class Example7_9 {
public static void main(String[] args) {
// TODO Auto-generated method stub
WindowTextArea win = new WindowTextArea();
}
}

Answer 1

http://www.cnblogs.com/upstart/p/6011927.html