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Can the primary key in the entity bean be a Java primitive type such as int?
EJB Interview Questions and Answers
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13. Can the primary key in the entity bean be a Java primitive type such as int?
The primary key can’t be a primitive type. Use the primitive wrapper classes, instead. For example, you can use java.lang.Integer as the primary key class, but not int (it has to be a class, not a primitive).
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