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Id
4568116
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2010-12-31T04:43:09.040
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2010-12-31T04:52:32.490
LastEditDate
2017-05-23T12:04:15.430
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4568047
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2
Score
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text
Body
When two class loaders load a class, you actually have two copies of the class. In your scenario when you do something like this <pre><code>StaticClass s = (StaticClass)newInstance2; </code></pre> Then by default your default system class loader comes into picture for casting. Since the newInstance2 is loaded from another classloader therefore it will give a ClassCastException. This will not work - they are represented by two different Class objects inside the JVM and the cast will fail. For more details refer to the following articles and forum entries: <ol> <li><a href="http://onjava.com/pub/a/onjava/2003/11/12/classloader.html" rel="nofollow noreferrer">http://onjava.com/pub/a/onjava/2003/11/12/classloader.html</a></li> <li><a href="http://java.sun.com/developer/technicalArticles/Networking/classloaders/index.html" rel="nofollow noreferrer">http://java.sun.com/developer/technicalArticles/Networking/classloaders/index.html</a></li> <li><a href="http://java.sun.com/docs/books/jvms/second_edition/html/ConstantPool.doc.html" rel="nofollow noreferrer">http://java.sun.com/docs/books/jvms/second_edition/html/ConstantPool.doc.html</a></li> <li><a href="http://www.coderanch.com/t/380416/java/java/Loading-same-class-two-different" rel="nofollow noreferrer">http://www.coderanch.com/t/380416/java/java/Loading-same-class-two-different</a></li> <li><a href="https://stackoverflow.com/questions/4013047/different-classloaders-cause-classcastexception-when-persisting-data-via-spring">Different classloaders cause ClassCastException when persisting data via Spring</a></li> </ol>
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