C++ 中的内部类只是一个名字命名机制.内部类和外部类之间不能直接访问对方成员. 而java的内部类则是外部类的一部分.内部类作为外部类一部分,可以直接访问外部类私有变量.
Inner Classes • Added to Java™ Development Kit (JDK™) 1.1 • Allow a class definition to be placed inside another class definition • Group classes that logically belong together • Have access to their enclosing class’s scope Properties of Inner Classes • You can use the class name only within the defined scope, except when used in a qualified name. The name of the inner class must differ from the enclosing class. • The inner class can be defined inside a method. Only local variables ed as final can be accessed by methods within an inner class. • The inner class can use both static and instance variables of enclosing classes and final local variables of enclosing blocks. • The inner class can be defined as abstract. • The inner class can have any access mode. • The inner class can be an interface that is implemented by another inner class
而java的内部类则是外部类的一部分.内部类作为外部类一部分,可以直接访问外部类私有变量.
• Added to Java™ Development Kit (JDK™) 1.1
• Allow a class definition to be placed inside another
class definition
• Group classes that logically belong together
• Have access to their enclosing class’s scope
Properties of Inner Classes
• You can use the class name only within the defined
scope, except when used in a qualified name. The name
of the inner class must differ from the enclosing class.
• The inner class can be defined inside a method. Only
local variables ed as final can be accessed by
methods within an inner class.
• The inner class can use both static and instance
variables of enclosing classes and final local variables
of enclosing blocks.
• The inner class can be defined as abstract.
• The inner class can have any access mode.
• The inner class can be an interface that is implemented
by another inner class