java - 进度监视器 :Progress interval

Question

如下代码所示，我有 4 个函数，我手动设置每个进度监视器的进度间隔 = 25%。

但是如果我有 20 个或更多函数，我的方法将更不切实际地手动设置进度间隔。

在给定 X 个函数的情况下，设置进度间隔的更好方法是什么？

class Task extends SwingWorker<Void, Void> {
    @Override
    public Void doInBackground() {
        int progress = 0;
        setProgress(0);
        while (progress < 100 && !isCancelled()) 
        {   
            functionA();
            try {
                Thread.sleep(1000);
            }catch(InterruptedException ex) {
                ex.printStackTrace();
            }
            progress += 25;
            setProgress(Math.min(progress, 100));

            taskOutput.setText("Step 2");
            functionB();
            progress += 25;
            setProgress(Math.min(progress, 100));

            try {
                Thread.sleep(1000);
            }catch(InterruptedException ex) {
                ex.printStackTrace();
            }

            taskOutput.setText("Step 3");
            functionC();
            progress += 25;
            setProgress(Math.min(progress, 100));

            try {
                Thread.sleep(1000);
            }catch(InterruptedException ex) {
                ex.printStackTrace();
            }

            taskOutput.setText("Step 4");
            functionD();
            try {
                Thread.sleep(1000);
            }catch(InterruptedException ex) {
                ex.printStackTrace();
            }
            progress += 25;
            setProgress(Math.min(progress, 100));
        }
        return null;
    }

Answer 1

int numberOfFunctions = 20;
int progress = 0;
...
function1();
setProgress((++progress * 100) / numberOfFunctions);  // progress is 5%
...
function20();
setProgress((++progress * 100) / numberOfFunctions);  // progress is 100%