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POJava generics code compiles in eclipse but not in command line
 

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  1. POJava generics code compiles in eclipse but not in command line
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    <p>I know there have been several questions in the past regarding things that compile in eclipse but not in command line, but I could not find an answer to my problem yet.</p> <p>In particular, I think that I was able to set eclipse to use my system compiler, but that still did not solve the problem.</p> <p>I am currently checking under : 'Preferences -> Java -> Installed JREs'. </p> <p>This contains only one JRE which is my system one.</p> <p><strong>Here are the specifics of the problem</strong></p> <p>I have a java generic class that takes as argument an Enum type, like so:</p> <pre><code>public class MyClass&lt;T extends Enum&lt;T&gt;&gt; </code></pre> <p>Somewhere inside the class I compare a known enum value with values of T. So for example let's assume I have this enum:</p> <pre><code>public enum OtherEnum{ a, b } </code></pre> <p>And then I test:</p> <pre><code>protected void foo(T enumVal){ if(enumVal == OtherEnum.a){ // do something } else if(enumVal == OtherEnum.b){ // do something else } } </code></pre> <p>This compiles with no problem in eclipse but in command line javac I get this error:</p> <blockquote> <p>incomparable types: T and OtherEnum</p> </blockquote> <p>I tried this on two systems that use variant of java 1.6 (1.6.0_26 and 1.6.0_16). One is a Mac, the other a linux. They both give the same error, while eclipse is compiling away with no problem.</p> <p>So:</p> <ol> <li><p>How do I make sure which compiler eclipse is using?</p></li> <li><p>What is even the problem here?</p></li> </ol> <p>Thanks!</p>
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    1. COMaybe this will help: http://stackoverflow.com/questions/1173290/using-java-generics-with-enums
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    2. CODo you use any external .jar files?
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    3. COPlease post a [SSCEE](http://sscce.org/) that demonstrates the problem you are having.
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