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POJava string index out of range: 0
 

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  1. POJava string index out of range: 0
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    <p>I have this problem where as soon as I enter my first input the program crashes and I get </p> <blockquote> <p>String index out of range: 0</p> </blockquote> <p>I've looked elsewhere and tried to find my mistakes but I found different problems which aren't what I had. Could someone please tell me where have I gone wrong?.</p> <p>Thanks for your help, here is the code:</p> <pre><code>import java.util.Scanner; public class Assignment1Q2 { public static void main(String[] args) { System.out.println("Thank you for your call,\nPlease take some time to answer a few questions"); collectData(); }//end of main public static void collectData() { Scanner userInput = new Scanner(System.in); int age; char gender; char show; int over30MY = 0, over30FY = 0, under30MY = 0, under30FY = 0; int over30MN = 0, over30FN = 0, under30MN = 0, under30FN = 0; System.out.println("\nWhat is your age?\n"); age = userInput.nextInt(); System.out.println("Male or Female (Enter M or Y)"); gender = userInput.nextLine().charAt(0); gender = Character.toLowerCase(gender); System.out.println("Do you watch the show regularly? (Enter Y or N)"); show = userInput.nextLine().charAt(0); show = Character.toLowerCase(show); if((age &gt; 30) &amp;&amp; (gender == 'm') &amp;&amp; (show == 'y')) { over30MY++; } else if((age &gt; 30) &amp;&amp; (gender == 'f') &amp;&amp; (show == 'y')) { over30FY++; } else if((age &lt; 30) &amp;&amp; (gender == 'm') &amp;&amp; (show == 'y')) { under30MY++; } else if((age &lt; 30) &amp;&amp; (gender == 'f') &amp;&amp; (show == 'y')) { under30FY++; } else if((age &gt; 30) &amp;&amp; (gender == 'm') &amp;&amp; (show == 'n')) { over30MN++; } else if((age &gt; 30) &amp;&amp; (gender == 'f') &amp;&amp; (show == 'n')) { over30FN++; } else if((age &lt; 30) &amp;&amp; (gender == 'm') &amp;&amp; (show == 'n')) { under30MN++; } else if((age &lt; 30) &amp;&amp; (gender == 'f') &amp;&amp; (show == 'n')) { under30FN++; }//end of if else }//end of collectData }// end of class </code></pre>
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    1. COWhy, ohhh why do people think that the stack trace is unimportant? Although, in this case, there are only 2 possibilities .... Nevertheless!
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    2. CO@ingo, this is where you actually tell him what the possibilities are, and why stack traces are important rather than posting your completely unhelpful comment.
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    3. CO@OP, It really helps to add in at least the portion of your stack trace of what the actual error is, and which line it occurs on.
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