uses

I'm currently trying to learn about classes and constructors/destructors. I understand what the two do, but I'm having a harder time with the destructors because I can't think of a practical application for its use. Can anyone provide an example with an explanation? Destructors are special member functions used to release any resources allocated by the object. The most common example is when the constructor of the class uses new , and the destructor uses delete to deallocate the memory. class Myclass { int *m_ptr; public: Myclass():m_ptr(new int) { } ~Myclass() { delete m_ptr; } //ToDo: Follow

What is a first class citizen function? Does Java supports first class citizen function? Edit: As mention on Wikepedia First class functions are a necessity for the functional programming style. Is there any other use of first class functions? A language that considers procedures to be "first-class" allows functions to be passed around just like any other value . Languages like Java 7 (and earlier) and C "kind of" have this capability: C allows function pointers to be passed around, but you can't dynamically define a function in those languages and suddenly pass that somewhere else. Java