Java design mode--java Builder mode

1, the Java Builder mode is to instantiate an object with an inner class, avoid having too many constructors for a class, and it is easy to make mistakes if the constructor has default parameters.

Public person (String name)

Person (String name, int age)

Person (String name, int age, Boolean sex)

2. The request and response classes in the Android okhttp framework use Java Builder mode.

3. Here is a small example:

/** * @authorSunKing1927 November 2, 2015 * Java Builder Mode*/ Public classPerson {PrivateString name; Private intAge ; Private Booleansex;  PublicString GetName () {returnname; }     Public intGetage () {returnAge ; }     Public BooleanIssex () {returnsex; }     Public Static classBuilder {PrivateString name; Private intAge ; Private Booleansex;  PublicBuilder name (String N) {name=N; return  This; }         PublicBuilder Age (inta) { age=A; return  This; }         PublicBuilder Sex (Booleans) {sex=s; return  This; }         PublicPerson Build () {return NewPerson ( This); }    }    PrivatePerson (Builder builder) {name=Builder.name; Age=Builder.age; Sex=Builder.sex; }}

 Public class Mainrun {    publicstaticvoid  main (string[] argv) {        new Person.builder (). Name ("Stephenhe"). Age (+). Sex (true). Build ();         + "\ n" + person.getage () + "\ n" + Person.issex ());}    }

4. Reference Blog:

Http://www.cnblogs.com/moonz-wu/archive/2011/01/11/1932473.html

Java design mode--java Builder mode