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关于 “在一个静态方法内调用一个非静态成员为什么是非法的” 一点个人理解 #1126

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daochen23 opened this issue Mar 13, 2021 · 4 comments
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关于 “在一个静态方法内调用一个非静态成员为什么是非法的” 一点个人理解 #1126

daochen23 opened this issue Mar 13, 2021 · 4 comments
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@daochen23
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问题

为什么在静态方法内调动一个非静态的成员是非法的？

我的理解

  • 首先，static 修饰的成员变量和方法是属于类的，它随着类的加载而加载，随着类的消失而消失
  • 而那些非 static 修饰的普通成员变量是属于类的实例的，也就是对象的，它们只有在类的实例化之后才会被加载
  • 所以静态的成员变量和静态方法比非静态的成员变量和方法优先加载

总结

一个优先加载的去调用一个还没有加载的当然是非法的了
@zaiweijian
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还有其他理解吗？

@daochen23
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还有其他理解吗？

这是我的一点理解，更深层的估计就要翻源码了

@61go
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61go commented Mar 24, 2021 via email

@charlienss
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charlienss commented Apr 17, 2021 •
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同意楼上，另外补充一点：字符串常量池还在堆里，只不过运行时常量在元空间。

@Snailclimb Snailclimb added the discuss discuss a problem label Apr 20, 2021
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@zaiweijian @Snailclimb @charlienss @61go @daochen23 and others