Java file bug..

package test;

public class Test{
    public static void main(String[] args) {
        int n = 153;
        boolean b = checkArm(n);
        if (b == true)
            System.out.println("This number is Armstrong");
        else
            System.out.println("This number is not Armstrong");

    }


    public static boolean checkArm(int n){

        int a = 0;
        int b;
        int c = n;

        while(n != 0){
            b = n% 10;
            a = a + b^3;
            n = (n-b) / 10;
        }

        return false;
    }

}