我正在尝试制作一个简单的刽子手游戏，但我遇到了这个错误：字符串索引超出范围：第19行为0

Question

import java.util.Scanner; 
 public class Hangman2
 { 


 public static void main(String[] args) 
 { 

     final int LETTERCOUNT = 6; 
     char [] letters = { '_', '_', '_', '_', '_', '_'}; 
     String input = "";
     int noOfGuesses = 0, count; 
     char guesses = input.charAt(0);
     Scanner keyboard= new Scanner (System.in); 

     System.out.println ("The word has " + LETTERCOUNT + "letters"); 

     do{
         noOfGuesses = noOfGuesses+1; 
     }while (noOfGuesses > 0);

     System.out.println ("Please enter your guess"); 
     char guess = input.charAt (0); 

     for (count = 0; count <6; count ++) { 
         char letter[]={'_','_','_','_',' ','_'}; 
     }

     for(int i=0; i<letter.length;i++){ 
         if(letter[i]==' '){ // Note use ' '(' + Blank Space + ') instead of '' 
         System.out.print("Blank Space"); 
         letter[i]='M'; 
     } 

     System.out.println("(" + i + ")" + letter[i]); 

     } 
 }

I'm not sure what to try. Any pointers would be nice.

Answer 1

If we have a little look at this...

String input = "";
int noOfGuesses = 0, count;
char guesses = input.charAt(0);

You create an empty String , then try and get the char at position 0 ...when nothing exists ...

I'm "guessing" that input was suppose to take input from the user in some way, but given the fact that you initialise the Scanner after this, I'm just not sure what's going on...

Answer 2

char guesses = input.charAt(0); 

the variable input is empty. But you are trying to get the 0th index value.