线程不会从Java开始

Question

下面的代码应该产生一个带有时间的常规帧,当时间达到90分钟时它应该显示一条消息.不知怎的,线程不会启动,消息Thread is working properly永远不会显示.我已经阅读了以下 Oracle文章但找不到任何解决方案.

public class Core extends JFrame implements Runnable{

private int second;
private int minute;
private JLabel presentor;
private Thread threadObject = new Thread();

public Core(){
    second = 1;
    minute = 0;
    presentor = new JLabel();
    writeLabel();
    add(presentor , BorderLayout.CENTER);
    threadObject.start();
}

public void run(){
    JOptionPane.showMessageDialog(null, "Thread is working properly");
    try{Thread.sleep(60000);}
    catch(InterruptedException e){e.printStackTrace();}
    updateTime();
    writeLabel();
    if(minute > 89){
        JOptionPane.showMessageDialog(null, "90 minutes have passed away , take a break!");
        this.getParent().setFocusable(true);
    }
}

public void writeLabel(){
    presentor.setText(minute + ":" + second);
}

public void updateTime(){
    second++;
    if(second < 60)
        return;
    second = 0;
    minute++;

}

}

还有一个类具有Main基本框架设置的方法,没有什么重要的.

Answer 1

你没有Runnable为你指定一个参数Thread(我认为应该是this你的Core类实现的参数Runnable):

private Thread threadObject = new Thread(this);