java math calculate absolute of a number

/**
 * @author lautturi.com 
 * Java example: get the absolute value of a number 
 */

import java.util.*;

public class Lautturi {
	public static void main(String[] args) {
		int i = 12;
		double d = 1.414d;
		float f = 3.14f;
		Integer I = 123;

		System.out.println(Math.abs(i));
		System.out.println(Math.abs(d));
		System.out.println(Math.abs(f));
		System.out.println(Math.abs(I));

		int i2 = -12;
		double d2 = -1.414d;
		float f2 = -3.14f;
		Integer I2 = -123;

		System.out.println(Math.abs(i2));
		System.out.println(Math.abs(d2));
		System.out.println(Math.abs(f2));
		System.out.println(Math.abs(I2));
	}
}

output:

12
1.414
3.14
123
12
1.414
3.14
123