The Java SE 8 release does not provide a type checking framework, but it allows you to write (or download) a type checking framework that is implemented as one or more pluggable modules that are used in conjunction with the Java compiler.įor example, you want to ensure that a particular variable in your program is never assigned to null you want to avoid triggering a NullPointerException. Type annotations were created to support improved analysis of Java programs way of ensuring stronger type checking. This form of annotation is called a type annotation and several examples are provided in A few examples of where types are used are class instance creation expressions ( new), casts, implements clauses, and throws clauses. This means that annotations can be used anywhere you use a type. As of the Java SE 8 release, annotations can also be applied to any type use. Before the Java SE 8 release, annotations could only be applied to declarations.
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