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POread in 2 files, convert to arrays, then print what has been called
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  1. POread in 2 files, convert to arrays, then print what has been called
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    copied!<p>So the data in the files are girls &amp; boys names. The order is the popularity and the corresponding number is the number of times the name was registered in a certain year. eg: </p> <p>Frank 678<br> William 2<br> etc </p> <p>There are 1000 names in each file. I need to load each file into <code>string[]</code> &amp; <code>int[]</code>, then when a name is written into the keyboard, the program must go thou the arrays, find the name, print out the index of the string array (less one obviously) &amp; the number that is in the <code>int[]</code>. my current code is just returning 1000, 1000. so I'm not sure where I'm going wrong Hope this makes sense, its for a uni question. Here is my code so far, sorry if it seems primitive, I'm still learning :-)</p> <pre><code>import java.io.*; import java.util.*; public class H252{ static final int ENTRIES = 1000; // Number of entries in the file public static int isInArray(String[] entries, String target) { int number = 0; for (int i = 0; i &lt; entries.length - 1; i++) if (entries[i] == target) number = i + 1; else number = ENTRIES; return number; } public static void LoadFile(String[] entries, int[] count, String filename) { Scanner file = new Scanner(filename); int a = 0; int b = 0; while (file.hasNextLine()) { if (file.hasNext()) entries[a++] = file.next(); if (file.hasNextInt()) count[b++] = file.nextInt(); } } public static void main(String[] args) { while (JPL.test()) { Scanner kb = new Scanner(System.in); String getName = kb.next(); String[] boyNames = new String[ENTRIES]; String[] girlNames = new String[ENTRIES]; int[] countB = new int[ENTRIES]; int[] countG = new int[ENTRIES]; LoadFile(girlNames, countG, "girlnames.txt"); System.out.print(isInArray(girlNames, getName) + countG[isInArray(girlNames, getName) - 1]); LoadFile(boyNames, countB, "boynames.txt"); System.out.print(isInArray(boyNames, getName) + countB[isInArray(boyNames, getName) - 1]); } } } java.lang.NullPointerException at H252.isInArray(H252.java:21) at H252.main(H252.java:64) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at edu.rice.cs.drjava.model.compiler.JavacCompiler.runCommand(JavacCompiler.java:272) </code></pre> <blockquote> <p></p> </blockquote>
 

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