Question

In Java: Write a program that generates a random number and asks the user to guess the number and keeps track of how many guesses it took

• If the user input is negative or zero then the loop must stop reading further inputs and display how many guesses they used
• If they guess the correct number display a message telling them they got it and exit the program
• If they guess the wrong number (but still a legal guess) you should tell them if they are too high or too low.
• You may choose to assign a limit to the range of the random number (ex. limit to numbers between 1 and 100, 1 and 1000, etc.)
• Use JOptionPane for all input and output
• Validate input to only accept integer values. If a non-integer is entered you should display an error message and prompt the user to try again – the count of how many guesses they’ve made should not be interrupted and the program should gracefully continue once valid entry is received.

• Hint: import java.util.Random and use Random rand = new Random(); to declare the rand variable and then use numberToGuess = rand.nextInt(x); to generate a random number (replace x with the upper limit you want to impose on your random number).
• You may write this with all code in the main method or you may use user generated methods.

Answer 1

Explanation:I have written the code in RandomGuess class and have used the JOPtionPane in the main method to accept and display the user input and output.I have also shown the output of the program, please find the images attached with the answer.Please upvote if you liked my answer and comment if you need any modification or explanation.

//code starts

import java.util.Random;

import javax.swing.JOptionPane;

public class RandomGuess
{
   public static void main(String[] args)
   {

       Random random = new Random();
       int numberToGuess = random.nextInt(100) + 1;
       int guessCount = 0;
       while (true)
       {
           try
           {
               guessCount++;
               int x = Integer.parseInt(JOptionPane.showInputDialog("Guess a number between 1 and 100? "));
               if (numberToGuess == x)
               {
                   JOptionPane.showMessageDialog(null, "Your guessed it correct by guessing " + guessCount + " times");
                   break;
               }
               if (x == 0 || x < 0)
               {
                   JOptionPane.showMessageDialog(null, "you made " + guessCount + " guesses");
                   break;
               }
               if (x < numberToGuess)
               {
                   JOptionPane.showMessageDialog(null, "Your guess is too low, try again");
                   continue;
               } else if (x > numberToGuess)
               {
                   JOptionPane.showMessageDialog(null, "Your guess is too high, try again");
                   continue;
               }
           } catch (NumberFormatException e)
           {
               JOptionPane.showMessageDialog(null, "Please enter a valid integer");
               continue;
           }

       }

   }
}

Output: