GuessMyNumber.java

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

class GuessMyNumber {
    protected int min = 1;
    protected int max = 31;

    public static void main(String args[]) 
    {
        GuessMyNumber instance = new GuessMyNumber();

        instance.startGame();
    }

    public void startGame()
    {
        String output = "0";
        int formatCounter = 0;
        String input = "";

        Scanner sc = new Scanner(System.in);

        for (int i = 1; i <= 5; i++) {
            int set = i;

            for(int j = this.min; j <= this.max; j++) {
                int binaryLen = Integer.toBinaryString(this.max).length();
                String binary = Integer.toBinaryString(j);
                String binaryFormatted = String.format("%0"+binaryLen+"d", Integer.parseInt(binary));

                if (binaryFormatted.charAt(binaryLen - set) != '1') {
                    continue;
                }

                System.out.print(Integer.parseInt(binaryFormatted, 2) + " ");
                formatCounter++;

                if ((formatCounter % 4) == 0) {
                    System.out.println();
                }
            }
                    
            System.out.print("Is your number on this set [1/0]? ");
            input = sc.nextLine() + input;

            System.out.println();
        }

        System.out.println();


        System.out.println("Here's your input: " + Integer.parseInt(input, 2));
    }
}