Plz help me with random number generators

Question

cane someone help me write a program that generates 2 random numbers, generates a random operation(+,-,/,*) then ask you for answer, and checks to see if the answer is right, and if not it corrects it for you.
thank you

Answer 1

when i do the cases i did the addtion as the first case, and now all i get is addition
import javax.swing.*;
import java.text.*;
import java.util.*;
public class randomnumbers
     public static void main(String[] arg)
          String input;
          int answer;
          int choice=1;
          Random rand = new Random();
          int num1 = (int) (Math.random()*9+1);
          int num2 = (int) (Math.random()*9+1);
          switch(choice)
               case 1:System.out.println("What is "+num1+"+"+num2);break;
               case 2:System.out.println("What is "+num1*'*'*num2);break;
               default:System.out.println("Illegel Operation");break;          
          input=JOptionPane.showInputDialog("What is the answer?");
          answer=Integer.parseInt(input);
}