An annotation type declaration 2. : Annotation « Language Basics « Java
An annotation type declaration 2.
/*
Java 2, v5.0 (Tiger) New Features
by Herbert Schildt
ISBN: 0072258543
Publisher: McGraw-Hill/Osborne, 2004
*/
import java.lang.annotation.*;
import java.lang.reflect.*;
@Retention(RetentionPolicy.RUNTIME)
@interface MyAnno {
String str();
int val();
}
public class Meta1 {
// myMeth now has two arguments.
@MyAnno(str = "Two Parameters", val = 19)
public static void myMeth(String str, int i)
{
Meta1 ob = new Meta1();
try {
Class c = ob.getClass();
// Here, the parameter types are specified.
Method m = c.getMethod("myMeth", String.class, int.class);
MyAnno anno = m.getAnnotation(MyAnno.class);
System.out.println(anno.str() + " " + anno.val());
} catch (NoSuchMethodException exc) {
System.out.println("Method Not Found.");
}
}
public static void main(String args[]) {
myMeth("test", 10);
}
}
