Java键盘输入一个数字， 输出其绝对值

import java.util.Scanner;

public class JueDuiZhi {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        if (a < 0) {
            System.out.println(a*-1);
        }
        else {
            System.out.println(a);
        }

    }

}