@Override
public String toSting() {   // 注意方法名拼寫(xiě)錯(cuò)了
    return "[" + super.toString() + "]";
}

下面是一段使用@Deprecated的代碼：
/**
 * 這里是javadoc的@deprecated聲明.
 * @deprecated No one has players for this format any more.  Use VHS instead.
 */
@Deprecated public class Betamax { ... }

@SuppressWarnings(value={"unchecked","fallthrough"})
public void lintTrap() { /* sloppy method body omitted */ }

@SuppressWarnings({"unchecked","fallthrough"})

@SuppressWarnings("unchecked")

@Reviews({  // Single-value annotation, so "value=" is omitted here
    @Review(grade=Review.Grade.EXCELLENT,
            reviewer="df"),
    @Review(grade=Review.Grade.UNSATISFACTORY,
            reviewer="eg",
            comment="This method needs an @Override annotation")
})

@UncheckedExceptions({
    IllegalArgumentException.class, StringIndexOutOfBoundsException.class
})

/**
 * This package holds my custom annotation types.
 */
@com.davidflanagan.annotations.Author("David Flanagan")
package com.davidflanagan.annotations;

import java.lang.reflect.*;

Class c = WhizzBangClass.class;                           
Method m = c.getMethod("whizzy", int.class, int.class);  
boolean unstable = m.isAnnotationPresent(Unstable.class);

AnnotatedElement target = WhizzBangClass.class; //獲得被查詢的AnnotatedElement
// 查詢AnnotatedElement的@Reviews annotation信息
Reviews annotation = target.getAnnotation(Reviews.class);
// 因?yàn)锧Reviews annotation類型的成員為@Review annotation類型的數(shù)組，
// 所以下面聲明了Review[] reviews保存@Reviews annotation類型的value成員值。
Review[] reviews = annotation.value();
// 查詢每個(gè)@Review annotation的成員信息
for(Review r : reviews) {
    Review.Grade grade = r.grade();
    String reviewer = r.reviewer();
    String comment = r.comment();
    System.out.printf("%s assigned a grade of %s and comment ‘%s‘%n",
                      reviewer, grade, comment);
}

package com.davidflanagan.annotations;
import java.lang.annotation.*;

/**
 * 使用annotation來(lái)描述那些被標(biāo)注的成員是不穩(wěn)定的，需要更改
*/
@Retention(RetentionPolicy.RUNTIME)
public @interface Unstable {}

/**
 * 使用Author這個(gè)annotation定義在程序中指出代碼的作者
 */
public @interface Author {
    /** 返回作者名 */
    String value();
}

import java.lang.annotation.*;
        
/**
 * Reviews annotation類型只有一個(gè)成員，
 * 但是這個(gè)成員的類型是復(fù)雜的：由Review annotation組成的數(shù)組
 */
@Retention(RetentionPolicy.RUNTIME)
public @interface Reviews {
    Review[] value();
}

/**
* Review annotation類型有3個(gè)成員： 
* 枚舉類型成員grade、
  * 表示Review名稱的字符串類型成員Reviewer、
  * 具有默認(rèn)值的字符串類型成員Comment。
 */
public @interface Review {
    // 內(nèi)嵌的枚舉類型
    public static enum Grade { EXCELLENT, SATISFACTORY, UNSATISFACTORY };

    // 下面的方法定義了annotation的成員
    Grade grade();                
    String reviewer();          
    String comment() default "";  
}

public @interface UncheckedExceptions {
    Class<? extends RuntimeException>[] value();
}