Java--对象与类

 

不要编写返回引用可变对象的访问器方法。

 -------------------------------------------------------------------------------------------------------------------------------------

 

 -------------------------------------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

 

 

 

 

 传引用：相当于别名。

 -------------------------------------------------------------------------------------------------------------------------------------

 -------------------------------------------------------------------------------------------------------------------------------------

 -------------------------------------------------------------------------------------------------------------------------------------

 

 -------------------------------------------------------------------------------------------------------------------------------------

 

 -------------------------------------------------------------------------------------------------------------------------------------

 

 -------------------------------------------------------------------------------------------------------------------------------------

 

 -------------------------------------------------------------------------------------------------------------------------------------

 -------------------------------------------------------------------------------------------------------------------------------------