Simple Calculator using java

Calculator with user input (Using scaner)

Class = Cal

 import java.util.Scanner;  
 public class Cal {  
      public static void main(String[] args) {  
           temp();   
      }  
      public static void oparator(int x, int y,String oparator) {  
           if("ADD".equals(oparator.toUpperCase())){  
                int z = x + y;  
                System.out.println(z);  
           }  
           else if("SUB".equals(oparator.toUpperCase())) {  
                int h = x - y;  
           System.out.println(h);  
           }  
           else if("DIV".equals(oparator.toUpperCase())) {  
                int i = x / y;  
           System.out.println(i);  
           }  
           else if("REM".equals(oparator.toUpperCase())) {  
                int j = x % y;  
           System.out.println(j);  
           }  
           else if("MUL".equals(oparator.toUpperCase())) {  
                int k = x * y;  
           System.out.println(k);  
           }            
      }  
      public static void temp(){  
          Scanner sc=new Scanner(System.in);  
          System.out.println("Seclect the Oparator");  
          String oparator=sc.nextLine();  
          System.out.println("Enter a first number: ");  
          int FirstNumber=sc.nextInt();  
          System.out.println("Enter a Second number: ");  
          int secondNumber=sc.nextInt();  
          oparator(FirstNumber,secondNumber,oparator);  
          temp();  
      }  
 }  

You can add more operators 

Operator	Description
+ (Addition)	Adds values on either side of the operator.
- (Subtraction)	Subtracts right-hand operand from left-hand operand.
* (Multiplication)	Multiplies values on either side of the operator.
/ (Division)	Divides left-hand operand by right-hand operand.
% (Modulus)	Divides left-hand operand by right-hand operand and returns remainder.
++ (Increment)	Increases the value of operand by 1.
-- (Decrement)	Decreases the value of operand by 1.

Calculator without user input

 public class cal{  
      public static void main (String args[]){  
           int x = 5 ;  
           int y = 6 ;  
           System.out.println("x + y =" + (x+y));  
           System.out.println("x - y =" + (x-y));  
           System.out.println("x / y =" + (x/y));  
           System.out.println("x * y =" + (x*y));  
           System.out.println("x % y =" + (x%y));  
      }  
 }  

Sketch

You can change the data printed in green

public class cal{

            public static void main (String args[]){

                        int x = 5 ;

                        int y = 6 ;

                        System.out.println("x + y =" + (x+y));

                        System.out.println("x - y =" + (x-y));

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

                        System.out.println("x * y =" + (x*y));

                        System.out.println("x % y =" + (x%y));

            }

}