import java.io.Closeable;

public class SomeClass extends Thread implements Closeable, AutoCloseable {
    private Boolean isActive = true;

    public void run() {
        System.out.println("START");
        while (isActive) {
            try {
                Thread.sleep(1000);
                System.out.println("ПКМ");
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
        System.out.println("STOP");
        System.out.println();
    }

    @Override
    public void close() {
        isActive = false;
    }
}