A constructor without any arguments or with default value for every argument, is said to be default constructor. What is the significance of default constructor? Will the code be generated for every default constructor? Will there be any code inserte…

In C++, compiler creates a default constructor if we don't define our own constructor (See this). Compiler created default constructor has empty body, i.e., it doesn't assign default values to data members (In java, default constructors assign defaul…

第2章    构造函数语意学 (The Semantics of Constructor) 关于C++,最常听到的一个抱怨就是,编译器背着程序猿做了太多事情.Conversion运算符就是最常被引用的一个样例. 2.1    Default Constructor的建构操作 C++ Annotated Reference Manual(ARM)指出"default constructors ...在须要的时候被编译器产生出来".keyword眼是"在须要的时候".被…

C++新手一般由两个常见的误解: 如果任何class没有定义默认构造函数(default constructor),编译器就会合成一个来. 编译器合成的的default constructor会显示的设定“class内每一个data member的默认值” 一.编译器在哪种情况下才会合成默认构造函数: 对于未声明构造函数的类,只有在以下四种情况下编译器才会为它们合成默认构造函数: 类的成员有一个类对象(Member Class Object),且该成员含有默认构造函数(default Const…

Predict the output of following program? 1 #include <iostream> 2 using namespace std; 3 4 int main() 5 { 6 7 cout << int() << endl; 8 return 0; 9 } A constructor without any arguments or with default values for every argument, is treated…

Method overloading |_Distinguishing overloaded methods If the methods hava the same name, how can Java know which method you mean? There's a simple rule : Each overloaded method must take a unique list of argument types. |_Overloading with primitives…

转载:http://dsqiu.iteye.com/blog/1669614 第一章 关于对象 使用class封装之后的布局成本: class并没有增加成本,data members直接内含在每一个class object之中,就像C struct一样.而member functions虽然被包含在class的声明之内,但是不出现在Object之中.每一个non-inline function 只会产生一个函数实体.至于inline function则会在每一个调用使用的地方产生一个函数实体(在…

Initialization & Cleanup Guaranteed initialization with the constructor In Java, the class designer can guarantee initialization of every object by providing a constructor. The coding style of making the first letter of all methods lowercase does not…

http://www.onjava.com/pub/a/onjava/2001/05/30/optimization.htmlComparing the performance of LinkedLists and ArrayLists (and Vectors) (Page last updated May 2001, Added 2001-06-18, Author Jack Shirazi, Publisher OnJava). Tips: ArrayList is faster than…

http://www.oracle.com/technetwork/java/javase/documentation/index-137868.html This document describes the style guide, tag and image conventions we use in documentation comments for Java programs written at Java Software, Oracle. It does not rehash r…