高级黑先森Fighting

String[] greeting = new String[3]; greeting[0] = "Welcome to Core Java"; greeting[1] = "by Cay Horstmann"; greeting[2] = "and Gary Cornell"; for (String g : greeting)

利用StringBuilder加速碎片语句的拼接 need to build up strings from shorter strings，Every time you concatenate strings, a newString object is constructed. This is time consuming and it wastes memory. StringBuild

C++类方法的定义位置    C++ NOTE: In C++, you generally define methods outside the class:  void Employee::raiseSalary(double byPercent) // C++, not Java

reflection reflection, the ability to find out more about classes and their  properties in a running program.it is of interest mainly to tool builders, not application programmers. 关于超类的构造函数调用

模板类型接口 NOTE: As of Java SE 5.0, the Comparable interface has been enhanced to be a generic type.  public interface Comparable {

Swing与AWT From now on, we say “Swing” when we mean the “painted” user interface classes, and we say “AWT” when we mean the underlying mechanisms of the windowing toolkit, such as event handling.

The following desktop functionalities are not supported on Android:       ActionScript 2, ContextMenu, DatagramSocket, Dockicon, EncryptedLocalStore, HTMLoader, LocalConnection, NativeMenu, Native

P41 任何变量只要加上public,final和static，基本上都可以变成全局变量可以取用的常量值 P78 java中所传递的所有东西都是值，但此值是变量所携带的值。引用对象的变量所携带的是远程控制而不是对象本身，若你对方法传入参数，实际上传入的是远程控制的拷贝。 P85 局部变量没有默认值。