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  1.  
  2. import java.util.Scanner;
  3.  
  4. class RPSLS_SS {
  5.  
  6.     public static void main(String[] args) {
  7.         Scanner game = new Scanner(System.in);
  8.         System.out.println("Choose your attack: rock,paper,scissors,lizard, or spock");
  9.         String cool = game.next();
  10.         int num_cool = 0;
  11.         String computerPlay = null;
  12.         String personPlay = null;
  13.         if (cool.equals("rock"))
  14.         {
  15.             System.out.println("You chose rock. Get ready...");
  16.             personPlay = ("rock");
  17.         }
  18.         if (cool.equals("paper"))
  19.         {
  20.             System.out.println("You chose paper. Get ready...");
  21.             personPlay = ("paper");
  22.         }
  23.         if (cool.equals("scissors"))
  24.         {
  25.             System.out.println("You chose scissors. Get ready...");
  26.             personPlay = "scissors";
  27.         }
  28.         int range = 3;
  29.         int start = 0;
  30.         int number = (int)(start + Math.random()*range );
  31.         switch (number) {
  32.             case 1:
  33.                 computerPlay = "rock";
  34.                 break;
  35.             case 2:
  36.                 computerPlay = "paper"; 
  37.                 break;
  38.             case 3:
  39.                 computerPlay= "scissors";
  40.                 break;
  41.             default:
  42.                 break;
  43.         }
  44.  
  45.         if (personPlay.equals(computerPlay)) 
  46.        System.out.println("It's a tie!"); 
  47.     else if (personPlay.equals("rock")) 
  48.        if (computerPlay.equals("scissors")) 
  49.           System.out.println("Rock crushes scissors. You win!!");
  50.     else if (computerPlay.equals("paper")) 
  51.             System.out.println("Paper eats rock. You lose!!"); 
  52.     else if (personPlay.equals("paper")) 
  53.        if (computerPlay.equals("scissors")) 
  54. 	System.out.println("Scissor cuts paper. You lose!!"); 
  55.     else if (computerPlay.equals("rock")) 
  56.             System.out.println("Paper eats rock. You win!!"); 
  57.     else if (personPlay.equals("scissors")) 
  58.          if (computerPlay.equals("paper")) 
  59. 	System.out.println("Scissor cuts paper. You win!!"); 
  60.     else if (computerPlay.equals("rock")) 
  61.             System.out.println("Rock breaks scissors. You lose!!"); 
  62.     else 
  63.          System.out.println("Invalid user input.");
  64.  
  65.     }
  66.  
  67. }
  68.  
  69.  
Runtime error #stdin #stdout #stderr 0.06s 4386816KB
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stdin
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rock
stdout
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Choose your attack: rock,paper,scissors,lizard, or spock
You chose rock. Get ready...
stderr
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Exception in thread "main" java.lang.NullPointerException
	at RPSLS_SS.main(Main.java:48)
https://ideone.com/KRgFo9
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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