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为什么Java中的静态方法不能是抽象的？

[英]Why can't static methods be abstract in Java?

 原文  2008-12-16 10:45:27  7   28    java/ abstract-class/ static-methods

问题描述

The question is in Java why can't I define an abstract static method?问题是在 Java 中为什么我不能定义抽象静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

28 个解决方案

解决方案1
 580  2008-12-16 10:50:02

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案2
 338  

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案3
 148  2008-12-16 10:48:57

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案4
 85 已采纳  2008-12-16 20:17:18

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案5
 14  2013-05-15 07:13:40

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案6
 12  2012-03-19 16:54:06

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案7
 5  

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案8
 5  2015-12-05 13:16:14

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案9
 3  2015-07-17 16:12:03

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案10
 3  2016-01-20 13:02:27

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案11
 2  2015-06-14 21:11:09

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案12
 2  2018-06-13 14:54:09

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案13
 2  2019-12-31 08:06:26

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案14
 1  2015-08-29 01:25:27

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案15
 1  2008-12-16 11:11:52

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案16
 1  2018-11-29 07:12:40

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案17
 1  2020-12-28 09:00:07

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案18
 0  2013-11-30 21:10:42

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案19
 0  2014-07-24 15:00:49

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案20
 0  2015-06-22 04:56:43

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案21
 0  2015-09-28 04:37:23

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案22
 0  2015-12-05 11:46:12

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案23
 0  2017-05-13 12:11:44

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案24
 0  2018-03-09 06:49:07

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案25
 0  2021-08-18 04:35:34

有一种情况可以一起使用 static 和 abstract ，那就是这两个修饰符都放在嵌套类的前面。

解决方案26
 0  2021-10-24 15:50:48

Static Method A static method can be invoked without the need for creating an instance of a class.A static method belongs to the class rather than the object of a class.静态方法 可以在不需要创建类的实例的情况下调用静态方法。静态方法属于类而不是类的对象。 A static method can access static data member and also it can change the value of it.静态方法可以访问静态数据成员，也可以更改其值。 Abstract Keyword is used to implement abstraction. Abstract关键字用于实现抽象。 A static method can't be overriden or implemented in child class.不能在子类中覆盖或实现静态方法。 So, there is no use of making static method as abstract.因此，将静态方法设为抽象是没有用的。

解决方案27
 -1  2013-02-16 14:19:09

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

解决方案28
 -1  2014-03-22 19:53:41

The question is in Java why can't I define an abstract static method?问题是在Java中为什么不能定义抽象的静态方法？ for example例如

abstract class foo {
    abstract void bar( ); // <-- this is ok
    abstract static void bar2(); //<-- this isn't why?
}

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