java calculator

//Write in ecalipse

import java.util.Random;
import javax.swing.JOptionPane;
import java.util.Scanner;

public class calcolatrice{

    public static void main(String[] args) {

        System.out.println("Launched!");
        Scanner scanner = new Scanner(System.in);

        System.out.println("insert a number: ");
        int num0 = scanner.nextInt();
        System.out.println("insert a number: ");
        scanner.nextLine();
        String op = scanner.nextLine();

        System.out.println("inserisci un numero");
        int num1 = scanner.nextInt();
        //RANDOM COMMAND
        if(op.equals("random")){
            Random r = new Random();
            int val = r.nextInt(num1)+1;
            System.out.println("random number: " + val);

        }
        //DACE COMMAND
        if(op.equals("dace")){
            Random r = new Random();
            int val = r.nextInt(num1)+1;
            System.out.println("random number: " + val);

        }
        //NORMAL OPERATORS
        if(op.equals("+")){
            System.out.println(num0 + num1);
        }
        if(op.equals("-")){
            System.out.println(num0 - num1);
        }
        if(op.equals("x") || op.equals("X") || op.equals("*")){
            System.out.println(num0 * num1);
        }
        if(op.equals("/") || op.equals(":")){
            System.out.println(num0 / num1);
        }



    }


}