Penambahan pada java

public class matematika
    {
    public static void main (String[] args)
        {
        int i = 4;
        int j = 2;
        double x = 27.475;
        double y = 7.22;

       
        System.out.println ("Berikut Tampilan Data = ");
        System.out.println ("Integer i = "+i);
        System.out.println ("Integer j = "+j);
        System.out.println ("Double x = "+x);
        System.out.println ("Double y = "+y);

        //penjumlahan
        System.out.println ("i + j = "+(i+j));
        System.out.println ("x + y = "+(x+y));

        //pengurangan
        System.out.println ("i - j = "+(i-j));
        System.out.println ("x - y = "+(x-y));

        //perkalian
        System.out.println ("i * j = "+(i*j));
        System.out.println ("x * y = "+(x*y));

        //pembagian
        System.out.println ("i / j = "+(i/j));
        System.out.println ("x / y = "+(x/y));

       
        }
    }