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  1. //****************************//
  2. //*****DO NOT TOUCH THESE*****//
  3. //****************************//
  4. import java.util.*;
  5. import java.io.*;
  6.  
  7. class NumberGuessingGame{
  8.  
  9.   public static int num;    //variable to hold randomly generated number
  10.   public static int guess;  //variable to hold user inputs
  11.   public static String ans; //variable to hold user input for y/n
  12.   public static int guessnumber = 7; //variable to hold number of guesses
  13.   public static int correctguess; //variable to hold number of correct guesses
  14.  
  15.  
  16.   //the main method
  17.   public static void main(String[] args) throws IOException{
  18.  
  19.     BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 
  20.  
  21.     //introduction
  22.     System.out.println("Welcome to the Number Guessing Game!");
  23.  
  24.     //loop to allow the user to play again
  25.     ans = "y";
  26. 	do{
  27.  
  28. 		numberGenerator();
  29. 		System.out.println("\nI have generated a random number between 1 and 100.  Please guess what the number is.");
  30. 		guess = Integer.parseInt(br.readLine());
  31.  
  32. 		//TASK 2 & 3: write in the conditions for when the user's guess is too high, too low, or correct
  33. 		      //if the guess is correct, the user should not be able to keep guessing
  34. 		      if(guess > num){
  35. 		        System.out.println("Your guess is too low.");
  36. 		      }
  37. 		      else if(guess < num){
  38. 		        System.out.println("Your guess is too high.");
  39. 		      }
  40. 		      else if(guess < 0){
  41. 		        System.out.println("You have entered a number below 0. Would you like to try again? (y/n)");
  42. 		      }
  43. 		      else if(guess < 100){
  44. 		        System.out.println("You have entered a number above 100. Would you like to try again? (y/n)");
  45. 		      }
  46. 		      else if(guess == num){
  47. 		        System.out.println("CONGRATULATIONS! You have guessed the number correctly! Would you like to play again? (y/n)");
  48. 		        correctguess++;}
  49.  
  50. 		        if(guessnumber == 6){
  51. 		          System.out.println("You have 6 guesses left.");
  52. 		        }
  53. 		        else if(guessnumber == 5){
  54. 		          System.out.println("You have 5 guesses left.");
  55. 		        }
  56. 		        else if(guessnumber == 4){
  57. 		          System.out.println("You have 4 guesses left.");
  58. 		        }
  59. 		        else if(guessnumber == 3){
  60. 		          System.out.println("You have 3 guesses left.");
  61. 		        }
  62. 		        else if(guessnumber == 2){
  63. 		          System.out.println("You have 2 guesses left.");
  64. 		        }
  65. 		        else if(guessnumber == 1){
  66. 		          System.out.println("You have 1 guess left.");
  67. 		        }
  68. 		        else if(guessnumber == 0){
  69. 		          System.out.println("You have ran out of guesses! Would you like to play again? (y/n)");}
  70.  
  71.  
  72. 		      //TASK 4: if the user has used up the 7 guesses, let the user know that they have run out of guesses
  73. 		      //they should then have the option of playing again
  74.  
  75. 		      System.out.println("Play again? (y/n)");
  76. 		      ans = br.readLine();
  77.  
  78. 		      if(ans.equals("n")){
  79. 		        System.out.println("Thank you for playing!");
  80. 		        System.out.println("You have gotten" + correctguess + "guessess right");
  81.  
  82.  
  83. 		        if(guessnumber == 7){
  84. 		          System.out.println("You have ran out of guesses! Would you like to play again? (y/n)");
  85. 		      }
  86. 		      else if(ans.equals("y")){
  87. 		      }
  88. 		      else{
  89. 		        System.out.println("Please enter y/n");
  90. 		      }
  91. 		     }
  92.  
  93. 	}while(ans != "y");
  94. }
  95.  
  96. public static void numberGenerator(){
  97.  
  98.     // ********* DO NOT TOUCH ************//
  99.     Random generator = new Random();
  100.     num = generator.nextInt(100) + 1;
  101.     // ***********************************//
  102. }
  103. }
  104.   //the numberGenerator method
  105.   //this method generates the random number
  106.  
Runtime error #stdin #stdout #stderr 0.07s 380160KB
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stdin
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Standard input is empty
stdout
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Welcome to the Number Guessing Game!

I have generated a random number between 1 and 100.  Please guess what the number is.
stderr
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Exception in thread "main" java.lang.NumberFormatException: null
	at java.lang.Integer.parseInt(Integer.java:454)
	at java.lang.Integer.parseInt(Integer.java:527)
	at NumberGuessingGame.main(Main.java:30)
https://ideone.com/q4kgsX
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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