import java.util.*;
import javax.swing.JOptionPane; // I used JOption, you can set it to command line if thats what you currently use.


public class RandomClassTest
{
   public static void main(String[] args)
   {
    Random randNumGenerator = new Random();
    int[] randomNumberArray = new int[4];
    String[] enteredUserNumberArray = new String[4];
    int[] actualUserNumberArray = new int[4];
    int reward = 0;

    for (int i=0; i<enteredUserNumberArray.length; i++) // Populates the user number array with 4 numbers.
        {
        enteredUserNumberArray[i] = JOptionPane.showInputDialog(null, "Number?"); // Will be asked four times to populate the array indexes.
            for (int j=0; j<actualUserNumberArray.length; j++)
            {
                actualUserNumberArray[j] = Integer.parseInt(enteredUserNumberArray[i]);
            }
        }


    for (int i=0; i<randomNumberArray.length; i++) //Populates the lottery random number array with 4 random numbers between 1-10.
        {
        randomNumberArray[i] = (randNumGenerator.nextInt(10)+1);
        }


    for (int i=0; i<actualUserNumberArray.length; i++)
    {
        for(int j=0; j<randomNumberArray.length; j++)
        {
            if (actualUserNumberArray[i] == (randomNumberArray[j]))
            {
                reward = reward + 1;
            }
        }
    }

    JOptionPane.showMessageDialog(null, "The numbers you entered were " + enteredUserNumberArray + ", the numbers in the lottery were: " + randomNumberArray + ", you managed to win €" + reward);

    System.exit(0);
    }
}