power of 4

public class DivisionCheck {

    private static final int FOUR_1 = 1 << 2;
    private static final int FOUR_2 = 1 << 4;
    private static final int FOUR_3 = 1 << 6;
    private static final int FOUR_4 = 1 << 8;
    private static final int FOUR_5 = 1 << 10;
    private static final int FOUR_6 = 1 << 12;
    private static final int FOUR_7 = 1 << 14;
    private static final int FOUR_8 = 1 << 16;
    private static final int FOUR_9 = 1 << 18;
    private static final int FOUR_10 = 1 << 20;
    private static final int FOUR_11 = 1 << 22;
    private static final int FOUR_12 = 1 << 24;
    private static final int FOUR_13 = 1 << 26;
    private static final int FOUR_14 = 1 << 28;
    private static final int FOUR_15 = 1 << 30;

    public static void main(String args[]){
        System.out.printf("64 is power of two %s", isPowerOfFour(64));
    }

    public static boolean isPowerOfFour(int x){
        switch(x){
            case FOUR_1:
            case FOUR_2:
            case FOUR_3:
            case FOUR_4:
            case FOUR_5:
            case FOUR_6:
            case FOUR_7:
            case FOUR_8:
            case FOUR_9:
            case FOUR_10:
            case FOUR_11:
            case FOUR_12:
            case FOUR_13:
            case FOUR_14:
            case FOUR_15: return true;
            default: return false;
        }
    }
}