A single member annotation. : Annotation « Language Basics « Java
A single member annotation.
import java.lang.annotation.*;
import java.lang.reflect.*;
@Retention(RetentionPolicy.RUNTIME)
@interface MySingle {
int value(); // this variable name must be value
}
public class Single {
// Annotate a method using a marker.
@MySingle(100)
public static void myMeth() {
Single ob = new Single();
try {
Method m = ob.getClass().getMethod("myMeth");
MySingle anno = m.getAnnotation(MySingle.class);
System.out.println(anno.value()); // displays 100
} catch (NoSuchMethodException exc) {
System.out.println("Method Not Found.");
}
}
public static void main(String args[]) {
myMeth();
}
}
