Java Basic Learning Path (iv) defining a simple Java class

Simple Java Class Development general principles:

1. The name of the class must be meaningful, and then how to say, let people see it.
2. All properties within a class must use private encapsulation and provide the Setter,getter method
3. There can be more than one construction method in a class, but you must keep a parameterless construction method
4. No output statements are allowed in the class, all outputs must be given to the
5. Class requires a method that can obtain complete information about the object, commonly called GetInfo (), which returns a string type of data

classBook {PrivateString name; Private intPrice ; Private intnum;  PublicBook () {} PublicBook (String na,intPriintN) {name=na; Price=pri; Num=N; }     PublicBook () {} Public voidSetName (String N) {name=N; }     Public voidSetprice (intp) { price=p; }     Public voidSetnum (intn) {num=N; }     PublicString GetName () {returnname; }     Public intGetPrice () {returnPrice ; }     Public intGetnum () {returnnum; }     Public  intGetmonney (intPriceintnum) {        returnprice*num; }     PublicString GetInfo () {return "Title:"+name+"\ n"+"Unit Price:"+price+"\ n"+"Quantity:"+num+"\ n"; }} Public classTest2 { Public Static voidMain (String args[]) {book Monney=NewBook ("the old man and the Sea", -,3); System. out. println (Monney.getinfo ()); }}

Java Basic Learning Path (iv) defining a simple Java class