Java 如何在JPanel上使用JLabel实现计时器？

我想获取objectinst的set变量，然后将其设置为JLabel，并将其设置为面板上已经存在的当前JLabel。但是我想让对象'inst'的变量（inst.Time（表示秒））递减1，删除当前的JLabel，并将更新的、递减的inst.Time添加到面板中

我想减少1秒作为倒计时计时器，直到它达到0并从WaitAndInterentWorkArea方法出来。有人能告诉我如何使用给定的代码吗？请帮忙。多谢各位

时间是一个整数

 private int WaitAndEnterIntoWorkArea(Instruction inst) // 'inst' is an object of Instruction arrayList
    {
        int index = 0;
        int nFirstYDirectionToMove = 1;

        JLabel busy = new JLabel(String.valueOf(inst.Time) + "s"); //inst.Time is a time that was set for that particular 'inst' and set the busy JLabel to show time + s, e.g. 5s or 3s (s represents seconds)
        busy.setFont(font3);
        busy.setForeground(Color.RED);

         if(inst.WorkArea.startsWith("anvil")) //If inst.WorkArea is set to "anvil" Go into the block of code
        {
            nFirstYDirectionToMove = 1; //Move over one (Not important)

                                                                      //I would like to decrement inst.Time 1 at a time to 0 and add to JPanel every second 
            while(true)
            {
                synchronized("row1" + String.valueOf(index)){
                    if(row1[index].getText().equalsIgnoreCase("Open")) //If JLabel row1[index].getText() is already set as text "Open" execute the if statement;
                    {
                                                                                                                              //I would like to remove the current JLabel (row1[index]) and add the 1 second decremented JLabel to the panel
                        panel.remove(row1[index]); //Remove the JLabel of row1[indexOfArea]  (row1 is an array of JLabels) from the panel
                        row1[index] = busy; //Set JLabel text of row1[index] to the busy JLabel //Set the 1 second decremented JLabel to the current JLabel
                        panel.add(row1[index]); //Add the JLabel with the new text label with something like e.g. 5s or 4s, etc. to the panel
                        revalidate();
                        repaint();
                        break;
                    }
                }
            }
        }

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如果我没有弄错的话，只需调用

busy.setText（String.valueOf（inst.Time）+“s”）应该是您所需要的全部。但和往常一样，我强烈建议使用JavaFX而不是Swing

至于时间，试试看

Timer timer = new Timer();
timer.scheduleAtFixedRate(()-> busy.setText(...), 0, 1000);

但是，我如何确保它改变JLabel，每次递减1秒？我相信我需要睡眠（1000），但我应该在哪里或如何使用它？@MadProgrammer你能帮忙吗？