Runnable的应用线程实现文本的变换显示

package com.hbsi;
import java.awt.Font;
import javax.swing.*;
public class TestThread extends JFrame implements Runnable {
int i=0;
JLabel label;
String[] content={"河北软件职业技术学院","河软CSDN乐知学院","软件开发Java班"};
public TestThread(){
Font f=new Font("宋体",Font.BOLD,15);
label=new JLabel(content[i]);
label.setFont(f);
JPanel jp=new JPanel();
jp.add(label);
add(jp);
this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
setBounds(400,300,300,300);
setVisible(true);
}
public static void main(String[] args) {
TestThread tt=new TestThread();
Thread t=new Thread(tt);
t.start();


}


@Override
public void run() {
while(true){
display();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}
public void display(){
label.setText(content[i]);
setTitle(content[i]);
i++;
if(i>=3)
i=0;
}


}