improve watchespn quality

/***********************************/ * $System.out.println (NewGenericclass//Output: FalsePanax Notoginseng //Analysis: Here T is a string type, there is no inheritance or implementation relationship with Date, why is the statement "return T instanceof Date" compiled? - //because Java generics are for encoding services, when the code is translated into bytecode, T is already an object type, the passed argument is a string type, that is, the surface type of T is objec

" startle ", whereas z.insert(4, "le") would alter the string buffer to contain " starlet ".All in all:String can is used for the constants.StringBuffer can used for some operating methods in multithreaded Environment.likeXML analyze, the Parameters O F HTTP analyze etc.StringBuilder can used for hql/sql splice,JSON package etc.Easy Time:pay attention to the address of StringFor example: Public Static void Main (string[] args) { String str1 = 1 + 2 + "apples"; String str2 = "Apples" + 1 +

make the product practical, good design is beautiful design, good design makes the product easy to understand, good design is honest, good design is inconspicuous, good design is durable, good design runs through every detail, good design is environmental protection, last but not the least, A good design is to design as little as possible. This interpretation of what is a good design, but also in the narrative of the true meaning of the design. From the initial selection of product material