对象方法的实现 [英] object method implementation

问题描述

我在一篇文章中读到，对象只是在程序执行期间存在.

I read in an article that objects there is just during program implementation. Is it correct?

推荐答案

是.
当您的程序中创建的对象超出范围"时，它们将被销毁:控制流从声明对象的块退出，即为"if"块:

Yes.
Objects you create in your program are destroyed when they "go out of scope": I.e. the flow of control exits from the block in which the object was declared, be that an "if" block:

if(myCondition)
   {
   int myInt;
   ...
   } // myInt is out of scope here, and can be destroyed.

或方法:

private void myMethod()
   {
   int myInt;
   ...
   } // myInt is out of scope here, and can be destroyed.

程序结束时，所有对象都超出范围，可以被销毁.

[edit]
重新读一遍，就意味着所有对象都被销毁了，这是不正确的:只要有对对象的引用，就不符合销毁的条件，因此您可以将引用传递给对象的范围之外.它是创建的.

When your program ends, all objects are out of scope, and can be destroyed.

[edit]
Reading back on that, it implies that all objects are destroyed, which is not true: as long as there is a reference to an object, it is not eligible for destruction, so you can pass a reference to an object outside the scope in which it was created.

   Point myPoint;
   myMethod();
   ...
private void myMethod()
   {
   int myInt;
   Point p = new Point(100,100);
   myPoint = p;
   } // myInt is out of scope here and so is p, but myPoint is
     // referring to the Point object, so it will not be destroyed.

[/edit]

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