java Annotation Meta-annotations

标签：java annotation   java   

Meta-annotations

@Target

1. CONSTRUCTOR: Constructor declaration
2. FIELD: Field declaration (includes enum constants) 
3. LOCAL_VARIABLE: Local variable declaration METHOD: Method declaration
4. PACKAGE: Package declaration
5. PARAMETER: Parameter declaration
6. TYPE: Class, interface (including annotation type),or enum declaration

@Retention

1. SOURCE: Annotations are discarded by thecompiler.
2. CLASS: Annotations are available in the class file by the compiler but can be discarded by the VM. 
3. RUNTIME: Annotations are retained by the VM at run time, so they may be read reflectively.

@Documented

1. Include this annotation in the Javadocs.

@Inherited

1. Allow subclasses to inherit parent annotations.

java Annotation Meta-annotations

标签：java annotation   java   

原文地址：http://blog.csdn.net/michael10001/article/details/24601161