Create java application of calculator

calculator.java

import java.util.Scanner;
public class SimpleCalculator {

	public static void mainM(String[] args) {
		Scanner input=new Scanner(System.in);
		
		int fnum,snum,ans;
		char sign; 
		
		
		System.out.println("Welcome User,This is a Simple Calculator Created by Victor Using the if statement");
		
		System.out.print("Please Enter your first digit: "); 
		
		fnum=input.nextInt(); 
		
		System.out.print("Enter the second digit: ");
		snum=input.nextInt();
		
		
		System.out.print("Enter the mathematical operator to be used: "); 
		sign=input.next().charAt(0); 
			ans=fnum + snum;
			System.out.println(fnum +" "+sign +" "+snum +"= "+" "+ ans );
		}
		else if(sign == '-')/* else if statement for minus sign*/
		{
			ans=fnum-snum;
			System.out.println(fnum +" "+sign +" "+snum +"= "+" "+ ans );
		}
		else if(sign == '/'){
				ans=fnum/snum;
				System.out.println(fnum +" "+sign +" "+snum +"= "+" "+ ans );
	    }
		else if(sign == '*'){
					ans=fnum*snum;
					System.out.println(fnum +" "+sign +" "+snum +"= "+" "+ ans );
		}
		else
			
		System.out.println("Your Input is not correct,please check it for any error(s).");
		
		
			
	}

}