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Java example source code file (

This example Java source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

annotation, class, named, namedimpl, serializable, string

The Java example source code

 * Copyright (C) 2006 Google Inc.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.


import static;

import java.lang.annotation.Annotation;

class NamedImpl implements Named, Serializable {

  private final String value;

  public NamedImpl(String value) {
    this.value = checkNotNull(value, "name");

  public String value() {
    return this.value;

  public int hashCode() {
    // This is specified in java.lang.Annotation.
    return (127 * "value".hashCode()) ^ value.hashCode();

  public boolean equals(Object o) {
    if (!(o instanceof Named)) {
      return false;

    Named other = (Named) o;
    return value.equals(other.value());

  public String toString() {
    return "@" + Named.class.getName() + "(value=" + value + ")";

  public Class<? extends Annotation> annotationType() {
    return Named.class;

  private static final long serialVersionUID = 0;

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