public class Main {
    public static void main(String[] args) throws InterruptedException {
        ThreadLocalTest custThread1 = new ThreadLocalTest();
        ThreadLocalTest custThread2 = new ThreadLocalTest();
        custThread1.start();
        Thread.currentThread().sleep(250);
        custThread2.start();
    }
}

class ThreadLocalClass{
    //private static ThreadLocal<Integer> ratio = new ThreadLocal<>();
    private static Integer ratio = new Integer(0);

    public static Integer getRatio() {
        //return ThreadLocalClass.ratio.get();
        return ThreadLocalClass.ratio;
    }

    public static void setRatio(Integer ratio) {
        //ThreadLocalClass.ratio.set(ratio);
        ThreadLocalClass.ratio = ratio;
    }
    public void printRatio() throws InterruptedException {
        Integer ratio = ThreadLocalClass.getRatio();
        Thread.currentThread().sleep(500);
        ThreadLocalClass.setRatio(ratio + 1);
        System.out.println("--Thread:" + Thread.currentThread().getId() + " | " + ThreadLocalClass.getRatio());
    }

}

class ThreadLocalTest extends Thread{

    ThreadLocalClass threadLocalClass = new ThreadLocalClass();
    @Override
    public void run() {
        ThreadLocalClass.setRatio(new Integer(0));
        try {
            for(int i = 0; i < 10; i++){
                threadLocalClass.printRatio();
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}