Pasted

import java.util.Scanner;
import java.util.function.IntBinaryOperator;
 
public class LambdaCalc
{
    static IntBinaryOperator add = (a, b) -> a + b;
    static IntBinaryOperator sub = (a, b) -> a - b;
    static IntBinaryOperator mult = (a, b) -> a * b;
 
 
    public static int calculate( int a, int b, IntBinaryOperator op )
    {
        return op.applyAsInt(a, b);
    }
 
    public static void printCalc( String sign, int a, int b, IntBinaryOperator op )
    {
        System.out.println(a + " " + sign + " " + b + " = " +  calculate(a, b, op));
    }
 
 
 
    public static void main( String[] args )
    {
        int a, b;
        Scanner input = new Scanner(System.in);
 
        System.out.print("Please enter two integers: ");
        a = input.nextInt();
        b = input.nextInt();
 
        printCalc("+", a, b, add);
        printCalc("-", a, b, sub);
        printCalc("*", a, b, mult);
    }
 
}