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POwhy's this program giving a runtime error on jcreator but not on netbeans?
 

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  1. POwhy's this program giving a runtime error on jcreator but not on netbeans?
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    <p>This is my solution for sphere's online judge <a href="https://www.spoj.pl/problems/PALIN/" rel="nofollow noreferrer">palin problem</a>. It runs fine on Netbeans, but the judge is rejecting my answer saying it gives a RuntimeError. I tried it on JCreator and it says:</p> <pre><code>Exception in thread "main" java.lang.NumberFormatException: For input string: "" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.Integer.parseInt(Integer.java:468) at java.lang.Integer.parseInt(Integer.java:497) at Main.main(Main.java:73) </code></pre> <p>I'm not passing an empty string for it to parse, why is this?</p> <p>The code:</p> <pre><code>import java.io.*; import java.util.*; class Main { public static int firstPalinLargerThanNum(int num){ int foundPalin =0; int evalThisNum = ++num; while (true){ if (isPalin(evalThisNum)) break; evalThisNum++; } foundPalin = evalThisNum; return foundPalin; } public static boolean isPalin(int evalThisNum){ boolean isItPalin = false; int dig=0; int rev=0; int n = evalThisNum; while (evalThisNum &gt; 0) { dig = evalThisNum % 10; rev = rev * 10 + dig; evalThisNum = evalThisNum / 10; } if (n == rev) { isItPalin=true; } return isItPalin; } public static void main(String args[]) throws java.lang.Exception{ BufferedReader r1 = new BufferedReader(new InputStreamReader(System.in)); /*BufferedReader r1 = new BufferedReader (new FileReader(new File ("C:\\Documents and Settings\\Administrator\\My Documents\\NetBeansProjects\\Sphere\\src\\sphere\\sphere\\PALIN_INPUT.txt")));*/ String read = r1.readLine(); int numberOfTestCases = Integer.parseInt(read); for (int i=0; i&lt;numberOfTestCases;i++){ read = r1.readLine(); if (read!=null){ int num = Integer.parseInt(read); System.out.println(firstPalinLargerThanNum(num)); } } } } </code></pre> <p>Input:</p> <pre><code>2 808 2133 </code></pre> <p>line 73 is: <code>int num = Integer.parseInt(read);</code></p>
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    1. COWhat is the input? And what is line 73?
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      1. POwhy's this program giving a runtime error on jcreator but not on netbeans?
      1. USMichael Myers
    2. COthe input is on the link, I'll post here for clarity.
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      1. POwhy's this program giving a runtime error on jcreator but not on netbeans?
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