Java程序辅导
C C++ Java Python Processing编程在线培训 程序编写 软件开发 视频讲解
C C++ Java Python Processing编程在线培训 程序编写 软件开发 视频讲解
This time, the object does not become garbage.This is because in the second statement a reference to the object is savedin a second variable, beta.Now when, in the third statement, alpha is set to null,there is still a reference to the object.
There can be many copies of the reference to an object.Only when there is no reference to an object anywhere does the object become garbage.
(Review:) How can you determine what an object of a particular class can do?