The single-value syntax : Annotations Types « Language « Java Tutorial

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Using the single-value syntax when applying an annotation that has other members, if other members all have default values.

@interface SomeAnno {
  int value();
  int xyz() default 0;
}


@SomeAnno(88)

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();
  int defaultValue() default 100;
}

@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(defaultValue=100, value=101)