Reverse Number sign - java

An integer value N is passed as the input. The program must reverse the sign of N and print -N as the output. 

Input Format: 

The first line contains N. 

Output Format: 

The first line contains -N. Boundary Conditions: -999999 <= N <= 999999 

Example Input/Output 1:

Input:

125

Output:

-125

Example Input/Output 2:

Input:

-346

Output:

 346

Example Input/Output 3:

Input: 

0

Output: 

0

Code:

import java.util.*;

import java.lang.*;

public class Hello {

    public static void main(String[] args) {

    Scanner s=new Scanner(System.in);

    int n=s.nextInt();

    if(Math.abs(n)==n)

    System.out.print(-1*n);

    else

    System.out.println(Math.abs(n));

  }

}