AnnotationTest

 
package com.anonotation;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD,ElementType.METHOD})
public @interface Anonotation {
String value() default "1";
int[] length();
}






package com.anonotation;

public class User {

	private String id;
	
	@Anonotation(value="a",length={111,12})
	private String name;
	
	
	public String getId() {
		return id;
	}
	
	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
}







package com.anonotation;

import java.lang.reflect.Field;


public class AnnotationTest {
	public static void main(String[] args) {
		User u = new User();
		u.setId("1");
		u.setName("abc");
		Class<?> claz = u.getClass();
		for(Field f :claz.getDeclaredFields()){
			if(f.isAnnotationPresent(Anonotation.class)){
				System.out.println(f.getAnnotation(Anonotation.class).value());
				System.out.println(f.getAnnotation(Anonotation.class).length()[0]);
			}
		}
	}
	
}