Annotations in Java

Hamzeen Hameem
Oct 9, 2015 · 2 min read
package io.hamzeen;import java.lang.annotation.Annotation;public class Driver {    public static void main(String[] args) {
Class<TestAlpha> obj = TestAlpha.class;
if (obj.isAnnotationPresent(IssueInfo.class)) {
Annotation annotation = obj.getAnnotation(IssueInfo.class);
IssueInfo testerInfo = (IssueInfo) annotation;
System.out.printf("%nType: %s", testerInfo.type());
System.out.printf("%nReporter: %s", testerInfo.reporter());
System.out.printf("%nCreated On: %s%n%n",
testerInfo.created());
}
}
}
package io.hamzeen;import io.hamzeen.IssueInfo;
import io.hamzeen.IssueInfo.Type;
@IssueInfo(type = Type.IMPROVEMENT, reporter = "Hamzeen. H.")
public class TestAlpha {
}
package io.hamzeen;import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* @author Hamzeen. H.
* @created 10/01/2015
*
* IssueInfo annotation definition
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
public @interface IssueInfo {
public enum Type {
BUG, IMPROVEMENT, FEATURE
}
Type type() default Type.BUG; String reporter() default "Vimesh"; String created() default "10/01/2015";
}

Hamzeen Hameem

Written by

Developer. Designer. Tea addict. Practices Agile. Cooks Java, PHP & JS. Brings novel interfaces to life.

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