equals():枚举类型可以直接用==比较,Enum类中实现的equals()方法也是直接用 ==实现,注:该Enum中该方法是final修饰的,实现该方法是为了在List、Set、Map中使用 hashCode():Enum中实现了hashCode()来和equals()保持一致,它也是final修饰的 getDeclaringClass():返回枚举常量所属枚举类型的Class对象,用来判断两个枚举...
enum SingletonDemo{ INSTANCE; public void otherMethods(){ System.out.println("Something"); } } 1. 2. 3. 4. 5. 6. 简简单单的一点代码就实现了一个线程安全的单例,与其说是写法鬼斧神工,不如说是恰如其分地应用了enum的性质。 在用enum实现Singleton时我曾介绍过三个特性,自由序列化,线程安全,保...
我个人对enum感兴趣主要是因为之前在介绍Singleton时有一个非常经验的枚举实现的单例,代码如下: 1 2 3 4 5 6 enumSingletonDemo{ INSTANCE; publicvoidotherMethods(){ System.out.println("Something"); } } 简简单单的一点代码就实现了一个线程安全,lazy loading的单例,与其说是写法鬼斧神工,不如说是恰如...
System.out.println(PizzaStatus.ORDERED.getClass());//class shuang.kou.enumdemo.enumtest.PizzaStatus 2.自定义枚举方法 现在我们对枚举是什么以及如何使用它们有了基本的了解,让我们通过在枚举上定义一些额外的API方法,将上一个示例提升到一个新的水平: publicclass Pizza { private PizzaStatus status; publice...
}// 获取所有public方法Method[] methods = enumClass.getMethods(); List<Field> fieldList =newArrayList<>();//1.通过get方法提取字段,避免get作为自定义方法的开头,建议使用 ‘find’或其余命名Arrays.stream(methods) .map(Method::getName) .filter( ...
Introduction to Using Interfaces in Java Enums In Java, enums are a special kind of class that can contain constants and methods. They provide a way to define a set of named values, often representing a fixed number of options or choices. One powerful feature of Java enums is their abili...
4.1. Non-abstract Methods Adding a concrete method in an enum is similar to adding the same method in any other class. We can use any access specifier e.g.public,privateorprotected. We can return values from enum methods or simply use them to perform internal logic. ...
Is it possible to use partial mocking for private static methods in PowerMock? 0 Mockito: verify that method is called on a specific enum 0 Mocking Enum class in TestNG (Incomprehension of solution) Related 4 How to unit test a method with enum parameters? 2 How to mock this in an ...
This is the common base class of all Java language enumeration classes. More information about enums, including descriptions of the implicitly declared methods synthesized by the compiler, can be found in section { Added in 1.5. Java documentation forjava.lang.Enum. ...
This is the common base class of all Java language enumeration classes. More information about enums, including descriptions of the implicitly declared methods synthesized by the compiler, can be found in section { Added in 1.5. Java documentation forjava.lang.Enum. ...