Talk:Plain old Java object
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My opinion is that any general restrictions or requirements other than those forced by the Java Language Specification on the java objects to be used in a program makes those objects not POJOs and those programming environments not strictly POJO compliant. In the case of annotations, requiring the existence of certain annotations is a restriction much like requiring the existence of certain methods. In addition, it also rules out the use of older versions of the JVM, including 1.4, which is still widely used in enterprise environments.
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