In this tutorial, we will learn know how to create an Enum. We will also look into the benefits of using enums in java and features of enum types. We will also learn using Java EnumvalueOf, enumvalues,EnumSetandEnumMapwith examples. Java Enum Example Javaenumkeyword is used to create a...
// best practicepublicenumSingleton{ INSTANCE; } 这种方式对于从C转Java的同学来说估计很难接受,我自己刚才始也难以接受,但是Java中一切都是对象,枚举也是对象!所以枚举对象里面是可以有成员变量与方法的!枚举单例的好处是:无法通过反射与序列化创建多个实例。项目中正真使用这种方式做单例的很少,原因有两点 枚举单...
It’s because the purpose of interfaces is for inheritance and polymorphism, not for static stuffs like that. So the best practice recommends us to use an enum instead. 这是因为接口的目的是用于继承和多态性,而不是用于类似的静态东西。所以最佳实践建议我们使用枚举来代替。 代码语言:java AI代码解释...
Have a good static analysis tool(and is part of Continuous Integration). Sonar is the best bet today. Understand the limits of Static Analysis. Static Analysis is not a magic wand. For me, results from Static Analysis are a signal: It helps me decide where I should look during peer or ...
// best practice public enum Singleton { INSTANCE; } 1. 2. 3. 4. 这种方式对于从C转Java的同学来说估计很难接受,我自己刚才始也难以接受,但是Java中一切都是对象,枚举也是对象!所以枚举对象里面是可以有成员变量与方法的!枚举单例的好处是:无法通过反射与序列化创建多个实例。项目中正真使用这种方式做单例...
It’s because the purpose of interfaces is for inheritance and polymorphism, not for static stuffs like that. So the best practice recommends us to use an enum instead. 这是因为接口的目的是用于继承和多态性,而不是用于类似的静态东西。所以最佳实践建议我们使用枚举来代替。
public enum Singleton { INSTANCE, public void testMethod() { } } 枚举的写法的优点: 不用考虑懒加载和线程安全的问题,代码写法简洁优雅 线程安全 反编译任何一个枚举类会发现,枚举类里的各个枚举项是是通过static代码块来定义和初始化的(可以见后面3.2节反编译分析单例枚举有分析到这个),它们会在类被加载时...
Why are ENUMS important for Readable Code? Avoid String when other types are appropriate Why should you minimize mutability? What is functional programming? Why should you prefer Builder Pattern to build complex objects? Why should you avoid floats for Calculations?
https://github.com/javastacks/spring-boot-best-practice 运行结果如下: 3.2 反编译分析单例枚举类 为了让大家进一步了解枚举类,我们将上面枚举单例类进行反编译javap -p Singleton.class,其中-p的意思是反编译的时候要包含私有方法。 // 这是反编译后的内容publicfinalclassSingletonextendsjava.lang.Enum<Singleto...
It’s because the purpose of interfaces is for inheritance and polymorphism, not for static stuffs like that. So the best practice recommends us to use an enum instead. 这是因为接口的目的是用于继承和多态性,而不是用于类似的静态东西。所以最佳实践建议我们使用枚举来代替。