public class numConTrick{ public static void main(String[] argv) { int x = 28; // sample number // if (argv.length > 0) // x = Integer.parseInt(argv[0]); // number from command line System.out.printf("%d dec == %s bin\n", x, dec2m(x, 2)); System.out.printf("%d dec == %s oct\n", x, dec2m(x, 8)); System.out.printf("%d dec == %s hex\n", x, dec2m(x, 16)); } static String dec2m(int N, int m) { String str = ""; for (int n = N; n > 0; n /= m) { int rem = n % m; str = rem