Java 窗口程序 进度显示工具

public class ProgressBarUtil extends Thread{

    public static AtomicInteger PROGRESS = new AtomicInteger(0);

    public static Long TOTAL = 1000L;

    private String remindText = "进度";
    public ProgressBarUtil() {
    }
    public ProgressBarUtil(String remindText) {
        this.remindText = remindText;
    }

    public static Thread begin(){
        PROGRESS.set(0);
        ProgressBarUtil progressBarUtil = new ProgressBarUtil();
        progressBarUtil.start();
        return progressBarUtil;
    }


    public static Thread begin(String remindText){
        ProgressBarUtil progressBarUtil = new ProgressBarUtil(remindText);
        progressBarUtil.start();
        return progressBarUtil;
    }

    @Override
    public void run() {
        showBar();
    }

    public void showBar(){
        while (true){
            int progress = PROGRESS.get();
            String showRemindText = remindText + ": " + progress + "/" +TOTAL;
            if (progress == TOTAL){
                System.out.print(showRemindText);
                break;
            }
            System.out.print(showRemindText);
            sleep(500);
            clearPrevShow(showRemindText);
        }
    }


    private static void clearPrevShow(String text){
        String remove = getRemove(text);
        if (remove != null && remove != ""){
            System.out.print(remove);
        }
    }

    private static String getRemove(String text){
        if (text == null || text == ""){
            return "";
        }
        return getRemove(text.length());
    }

    private static String getRemove(Integer i){
        i+=4;
        StringBuilder stringBuilder = new StringBuilder();
        for (Integer integer = 0; integer < i; integer++) {
            stringBuilder.append("b");
        }
        return stringBuilder.toString();
    }

    public static void sleep(long millis){
        try {
            Thread.sleep(millis);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }




    public static void main(String[] args) {
        new Thread(() -> {
            for (int i = 0; i < 500; i++) {
                PROGRESS.incrementAndGet();
                sleep(10);
            }
        }).start();
        new Thread(() -> {
            for (int i = 0; i < 500; i++) {
                PROGRESS.incrementAndGet();
                sleep(5);
            }
        }).start();
        new ProgressBarUtil().start();

        sleep(500000);
    }
}