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POArrayList not using the overridden equals
 

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    <p>I'm having a problem with getting an ArrayList to correctly use an overriden equals. the problem is that I'm trying to use the equals to only test for a single key field, and using ArrayList.contains() to test for the existence of an object with the correct field. Here is an example</p> <pre><code>public class TestClass { private static class InnerClass{ private final String testKey; //data and such InnerClass(String testKey, int dataStuff) { this.testKey =testKey; //etc } @Override public boolean equals (Object in) { System.out.println("reached here"); if(in == null) { return false; }else if( in instanceof String) { String inString = (String) in; return testKey == null ? false : testKey.equals(inString); }else { return false; } } } public static void main(String[] args) { ArrayList&lt;InnerClass&gt; objectList = new ArrayList&lt;InnerClass&gt;(); //add some entries objectList.add(new InnerClass("UNIQUE ID1", 42)); System.out.println( objectList.contains("UNIQUE ID1")); } } </code></pre> <p>What worries me is that not only am I getting false on the output, but I'm also not getting the "reached here" output. </p> <p>Does anyone have any ideas why this override is being completely ignored? Is there some subtlety with overrides and inner classes I don't know of?</p> <p>Edit: Having problems with the site so I cant seem to mark the answered. Thanks for the quick response: yes an oversight on my part that it is the String .equals thta is called, not my custom one. I guess it's old fashioned checks for now</p>
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