无法在java中更新我的计时器的分钟和小时标记。摆动

Question

我想用java做秒表。秋千和秒表课。java，但由于某种原因，当我运行它时，只有几秒钟有效，而小时和分钟保持在0。你能帮我吗？

这是秒表。java类

    public class Cronometro {
    private int secondi;
    private int minuti;
    private int ore;
    private boolean state=true;
    
    public Cronometro(){
        
    }
    
    public void crono(JLabel s, JLabel m, JLabel h, ActionEvent evt){
        state=true;
        
        Thread t = new Thread(){
            public void run(){
                for(;;){
                    if(state==true){
                       try{
                           sleep(10);
                           secondi++;
                           if(secondi>60){
                               secondi=0;
                               minuti++;
                               
                           }
                           if(minuti>60){
                               secondi=0;
                               minuti=0;
                               ore++;
                           }
                           s.setText(" :"+secondi);
                           m.setText(" : "+minuti);
                           h.setText(""+ore);
                       } catch(Exception e){
                           
                       }
                    }
                    else{
                        break;
                    }
                }
            }
        };
        
        t.start();
    }
    
    public void setState(boolean state){
        this.state=state;
    }
    
}

gui/main。java几乎都是由netbeans生成的

Answer 1

这就是如何使用Swing定时器每秒运行update：

class Cronometro {
    private int secondi;
    private int minuti;
    private int ore;
    private boolean state=true;
    private Timer timer;

    private final JLabel s, m,  h;

    public Cronometro(JLabel s, JLabel m, JLabel h) {
        super();
        this.s = s;
        this.m = m;
        this.h = h;
    }

    public void crono(JLabel s, JLabel m, JLabel h){
        state=true;
        if(timer != null) {
            timer.stop();
        }

        timer = new Timer(1000, e->update());
        timer.start();
    }

    public void update(){

        if(! state) return;
            try{
                secondi++;
                if(secondi>60){
                    secondi=0;
                    minuti++;

                }
                if(minuti>60){
                    secondi=0;
                    minuti=0;
                    ore++;
                }
                s.setText(" :"+secondi);
                m.setText(" : "+minuti);
                h.setText(""+ore);
            } catch(Exception e){
                e.printStackTrace();
            }
    }

    public void setState(boolean state){
        this.state=state;
    }
}