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Editorial Team
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Asked: 2026-06-04T18:06:21+00:00

I am switching an enterprise application built on Spring 3.1.0, Hibernate 3.6.0 from Java

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I am switching an enterprise application built on Spring 3.1.0, Hibernate 3.6.0 from Java 6 32bit to Java 7 64 bit.
Has anybody done that? Any problems? Are there any resources on the subject?

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  1. Editorial Team

    Here are the pitfalls I know about:

    • You might have to upgrade your IDE to be able to enable Java 7 features.
    • Make sure that command line tools and your IDE use the same Java version. If you’re using Maven, for example, look into $HOME/.mavenrc and/or check the environment variable JAVA_HOME
    • Check the source/target options of the Java compiler.
    • Java 7 supports generics better than Java 6 so some code will now compile that failed with Java 6
    • The 64bit version of Java uses a lot more memory than the 32bit version
    • The first release of Java 7 had a severe bug in the JIT compiler which broke Lucene. Use at least b2 or better.
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