Im not too sure, I did some googling, and I think this method is called "Scanner", where one int is able to take more than 1 variable, however, whenever I try to use scanner it always says "Scanner class file not found"
Code:
import java.util.Scanner;

public class SimpleMath 
{
public static void main( String args[] )
{ 
Scanner input = new Scanner( System.in );

int num1;
int num2;
int num3;
int num4;
int num5;

System.out.print( "Enter five positive integers, with a single space in between each.");	
}
}
^ Taken off of a site, same method tho... Not my code

So anyway, heres my question:

I am trying to make a program where it first generates 4 random numbers (lets say for example reasons the numbers are 5 9 2 3)
So the user now has to guess what these numbers are, however, heres how I done it (if there is a better approach, im open to ideas):
there are 4 ints, each int is named after a placement in the number, like int one int two int three int four
then, the user can type in an int called code
so now what I want to do is have it so if they sat 5923 then it will take 5 from code and see if it matches int one, then 9 from code, see if it matches int two, and so on...

(Also just a side issue, how would I make code incorporate spaces, so that way people can enter 5923 or 5 9 2 3, and it all works the same)
Thanks for any help anyone can provide.

My code:
Code:
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.Random;

public class PINDecoder
{
    public static void write (String text)
    {
        System.out.print (text);
    }


    public static void writeLine (String text)
    {
        System.out.println (text);
    }


    public static void write (int number)
    {
        System.out.print (number);
    }


    public static void writeLine (int number)
    {
        System.out.println (number);
    }


    public static void write (char character)
    {
        System.out.print (character);
    }


    public static void writeLine (char character)
    {
        System.out.println (character);
    }


    public static String readString ()
    {
        BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
        String var = "";
        try
        {
            var = br.readLine ();
        }
        catch (IOException ioe)
        {
            System.out.println (ioe.toString ());
        }
        return var;
    }


    public static int readInt ()
    {
        BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
        String tempVar = null;
        try
        {
            tempVar = br.readLine ();
        }
        catch (IOException ioe)
        {
            System.out.println (ioe.toString ());
        }
        int var = Integer.parseInt (tempVar);
        return var;
    }


    public static char readChar ()
    {
        BufferedReader br = new BufferedReader (new InputStreamReader (System.in));
        char var = 0;
        try
        {
            var = (char) br.read ();
        }
        catch (IOException ioe)
        {
            System.out.println (ioe.toString ());
        }
        return var;
    }

public static void main (String args[])
    {
        char decode = 0;
        char exit = 0;
        int counter;
        int code = 0;
        int trys = 0;
        
Random rand = new Random();
            
        int one = rand.nextInt(10);
        int two = rand.nextInt(10);
        int three = rand.nextInt(10);
        int four = rand.nextInt(10);


        {
            write ("PIN (Personal Identification Number) Decoder");
            write ("");
            
            write ("You are given unlimited time to attempt to decode the randomly selected 4 digit code.");
            writeLine ("");
            writeLine ("After you get it right, it will tell you how many guesses it took you... Have fun...");
            write ("");
            while(exit != 'N' || exit != 'n') {
            writeLine ("");
            writeLine ("Type 'Crack' to begin decoding the 4 randomly selected numbers");
            writeLine ("");
            decode = readChar ();
            
            
            if (decode == 'C' || decode == 'c') {
            writeLine ("Generating PIN...");            
try{
  Thread.currentThread().sleep(3000);
}
catch(Exception e){
}

            writeLine (one + " | " + two + " | " + three + " | " + four);
            code = readInt();
            }
                while (code != one && code != two && code != three && code != four)
                {trys = trys + 1;
                writeLine ("Incorrect. Try Again. (" + trys + ")");
                code = readInt();
                }
                
                if (code == one && code == two && code == three && code == four)
                {
                writeLine ("Code has been broken");
                writeLine ("Decoded PIN: " + one + " | " + two + " | " + three + " | " + four);
                }
PS: I am still learning Java, I showed this code to a friend, and he told me it was weak, just a little FYI incase anyone cares...