public class Test { private final Operate operate = new Operate();
public static void main(String[] args) { new Thread(new Runnable() { @Override public void run() { for (int i = 1; i <= 50; i++) { operate.doSubMethod(i); } } }).start();
for (int i = 1; i <= 50; i++) { operate.doSupMethod(i); } } } class Operate{ private boolean isSub = true;