Utility for creating constants to be used as states (bitwise).

States.java

import java.util.Arrays;

public class States {

	public static final int EMPTY = 0;

	public static int create(int ref) {
		return 1 << ref;
	}

	public static int add(int base, int... states) {
		return Arrays.stream(states).reduce(base,
				(current, state) -> current |= state);
	}

	public static int remove(int base, int... states) {
		return Arrays.stream(states).reduce(base,
				(current, state) -> current &= ~state);
	}

	public static boolean contains(int base, int... states) {
		return Arrays.stream(states).allMatch(state -> (base & state) != 0);
	}

	public static int to(int... states) {
		return add(EMPTY, states);
	}

	private States() {
		throw new UnsupportedOperationException();
	}
}

StatesTest.java

public class StatesTest {

	public static final int ON = States.create(0);

	public static final int PAUSE = States.create(1);

	public static final int OFF = States.create(2);

	public static void main(String[] args) {
		int state = States.to(ON, PAUSE);
		System.out.println("START: " + state);

		if (States.contains(state, PAUSE)) {
			state = States.remove(state, PAUSE);
			System.out.println("PAUSE REMOVED: " + state);
		}

		state = States.remove(state, ON);
		System.out.println("ON REMOVED: " + state);

		state = States.add(state, OFF);
		System.out.println("OFF ADDED: " + state);
	}
}