Java counting

Hello again! Here I come with simple java program, which generates random counting samples.Feel free to inspire yourself :).

import java.util.*;
import java.io.* ;

public class InputStart {
    public static BufferedReader reader;
    static String again;

    /**
     * @param args
     */

    public static void main(String arg[]) throws IOException {
    reader = new BufferedReader(new InputStreamReader(System.in));

        do {
        Random random1 = new Random();
        int number1 = random1.nextInt(500);
        Random random2 = new Random();
        int number2 = random2.nextInt(500);

            System.out.println("Generate excercise? y / n.");
            String answer1 = reader.readLine();

            if (answer1.equals("y")) {
                System.out.println((number1) + "+" + (number2) + " is: ");
                 String result2 = reader.readLine();
                 int result1 = Integer.parseInt(result2);

                 if (result1 == (number1)+(number2)) {
                     System.out.println("Good answer.");
                 }
                     else if (result1 != (number1)+(number2)) {
                     System.out.println("Wrong answer.");
                 }
            }
            else System.exit(0);

                 System.out.println('\n' + "Press enter for continue...");
                 again = reader.readLine();
        }
                    while(!again.equals("n"));
                    System.exit(0);
}
}