Java Swing 赋值有关问题

Java Swing 赋值问题
本人java新手，现有一个界面，界面有个按钮和label，点了按钮后执行一些操作，在执行操作过程中给界面的label赋值，为什么只能显示最后一个？

Java code

public class M3 {    public void Time1(Object obj) {        int i = 0;        while (true) {            if (i == 5)                break;            if (obj instanceof AAA) {                AAA a = (AAA) obj;                a.label.setText("this is " + i);                a.setTitle("this is " + i);                System.out.println("this is " + i);                try {                    Thread.sleep(5000);                } catch (Exception ex) {                    System.out.println(ex.toString());                }            }            i++;        }    }}import java.awt.BorderLayout;import java.awt.Color;import java.awt.Container;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.JLabel;import javax.swing.JPanel;public class AAA extends JDialog{    JLabel label;    JButton b;    public AAA() {                setBounds(100, 100, 400, 130);        Container contentPanel = getContentPane();        label = new JLabel("", JLabel.CENTER);        JPanel panel = new JPanel();        b = new JButton("安装");        b.setForeground(Color.blue);        b.addActionListener(new ActionListener(){            @Override            public void actionPerformed(ActionEvent e) {                // TODO Auto-generated method stub                execute();            }        });        panel.add(b);        contentPanel.add(panel, BorderLayout.NORTH);        contentPanel.add(label, BorderLayout.SOUTH);        setVisible(true);    }    void execute(){                M3 m3=new M3();        m3.Time1(this);        //this.dispose();    }    public static void main(String[] args) {        AAA app = new AAA();            }}

[解决办法]
这是典型的SWIGN线程模型的问题，你如果是要做一些定时的操作，建议用javax.swing.Timer来做，由Timer完成线程同步，这样不会出现上面的问题
[解决办法]
a.label.setText("this is " + i);
 a.setTitle("this is " + i);

每次读就被覆盖了，肯定就剩最后一个了。
String s = "";
s += i;
label.setText("this is " + s);

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