Single-Member Annotations : Annotations Types « Language « Java Tutorial

1. Java Tutorial
2. Language
3. Annotations Types

1. Single-Member Annotations contains only one member.
2. Single-Member Annotations allow a shorthand form of specifying the value.
3. The name of the member must be value.

import java.lang.annotation.Annotation;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;


@Retention(RetentionPolicy.RUNTIME)
@interface MyAnnotation {
  int value();
}

@MyAnnotation(102)
public class MainClass {
  // Annotate a method.
  @MyAnnotation(101)
  public static void myMethod() {
  }

  public static void main(String[] arg) {
    try {
      MainClass ob = new MainClass();

      Method m = ob.getClass( ).getMethod("myMethod");
      Annotation[] annos = m.getAnnotations();

      System.out.println("All annotations for myMeth:");
      for(Annotation a : annos)
      System.out.println(a);

    } catch (Exception exc) {
    }
  }
}

All annotations for myMeth:
@MyAnnotation(value=101)