BaseConversion.java

import java.util.ArrayList;
public class BaseConversion {
	public static void main(String...z) {
		
		if (z.length !=2) {
			System.out.printf("Usage: java BaseConversion <integer> <base>\n");
			System.exit(1);
		}
		
		ArrayList<Integer> result = new ArrayList<Integer>();
		int num = Integer.parseInt(z[0]);
		int base = Integer.parseInt(z[1]);
		int remainder = 0;

		while (num !=0) {
			remainder = num % base;
			num = num / base;
			result.add(remainder);
		}

		String res = "";
		for (int i = result.size() - 1; i >= 0; --i) {
			res += result.get(i);
		}

		System.out.printf("%s to %s = %s\n", z[0], z[1], res);
	}
}

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