java nested class example

======= subclasses are instantiated by default when the parent class is empty, the constructor is super (), which can be omitted.However, when the parent class does not have an empty construction method, it must call this method in the subclass to instantiate the parent class before the instance class is real.The defau

functions and their default parameters Here we have the concept of inline functions. Member functions can also be inline. If they are implemented within the class, the inline keyword can be added or not added. For external class implementations, inline needs to be added, For example, inline void clock: sethour (INT hour ){}. In fact, even if inline is added, it

1 Packagetimers;2 3 ImportJava.util.Timer;4 ImportJava.util.TimerTask;5 6 /*7 * Mainly want to use the object of this class in another class, how to use it? How to pass the same instance object8 */9 Public classTimerdemo {Ten Public Static voidMain (string[] args) { OneTimer T =NewTimer (); AT.schedule (NewMyTask (t), 3000); - } - } the - classMyTaskextendsTimerTask { //In order to use the T o

Local class Classes defined in a function are called local classes. In a local class, only objects and functions in its peripheral scope can be associated, because the variables in the peripheral scope are irrelevant to the objects in the department class. When defining a local class, note that static member functions

have a master-slave relationship and cannot access each other, there is no friend relationship either. (2) From the Perspective of access permissions, nested classes can be both private and public. In the preceding example, the access permission of the nested Class B is public. You can use this

C ++ does not seem to distinguishInternal and Nested classesTwo nouns. Internal and Nested classesDefine a class in a class. Local classDefines a class in a function. (C ++ cannot define a function in a function. C ++ defines the function in the

access control that the normal class has.If a member is not defined inside a nested class, its definition can only be written to the same scope as the perimeter class, and the definition cannot be written in the perimeter class unless it is qualified with a perimeter

directly outside without creating an instance object of the external class, for example, assuming that inner is a static Nested class defined in the outer class, you can create a inner class using the following statement:Because

Nested class is generally C ++, and inner class is generally Java. Nested class is divided into static nested class and non-static inner

(intv) One { A synchronized(mysynchronized.class) - { - while(true) the { - System.out.println (v); - } - } + } - + Public voidRun () A { at Printval (val); - } -}View CodeAdditional Lock Examples:1 Public classMysynchronizedextendsThread2 {3 PrivateString name;4 5 PrivateString Val;6 7 Publicmysynchronized (string name, String v)8 {9 This. Name =name;Tenval =v; One } A

internal class defined externally by the method to become the static nested class. It no longer has the characteristics of the internal class. All, in a narrow sense, it is not an internal class. There is no difference between static ne