public class Main {

    static int cap = 100;
    static int time = 0;

    static Thread plus;
    public static void main(String[] args) throws InterruptedException {

        Thread drink = new Thread(new Runnable(){
                @Override
                public void run() {
                    while (cap > 0) {
                        try {
                            Thread.sleep(3000);
                        } catch (InterruptedException e) {}
                        cap -= 10;
                        System.out.println(cap);
                        time += 3;
                    }
                    Thread.currentThread().interrupt();
                    plus.interrupt();
                    System.out.println(time);
                }
            });

        plus = new Thread(new Runnable(){
                @Override
                public void run() {
                    while (cap > 0) {
                        try {
                            Thread.sleep(6000);
                        } catch (InterruptedException e) {}
                        cap += 10;
                        System.out.println(cap);
                        time += 6;
                    }
                    Thread.currentThread().stop();
                }
            });

        drink.start();
        plus.start();
    }
}

public class Main {

static int cap = 100;
static int time = 0;

static Thread plus;

public static void main(String[] args) {

    Thread drink = new Thread(new Runnable() {
        @Override
        public void run() {
            while (cap > 0) {
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException ignored) {
                }
                cap -= 10;
                System.out.println(cap);
                time += 3;
            }
            plus.interrupt();
            System.out.println(time);
        }
    });

    plus = new Thread(new Runnable() {
        @Override
        public void run() {
            while (cap > 0) {
                try {
                    Thread.sleep(6000);
                } catch (InterruptedException e) {
                    break;
                }
                cap += 10;
                System.out.println(cap);
                time += 6;
            }
        }
    });

    drink.start();
    plus.start();
}
}