Create an object's builder pattern __java

* * Create an object's builder mode * Builder mode is only suitable for scenarios where you need to specify multiple optional parameters when creating an object.
 * Client: * 1: In the client can obtain the person object through the following code * Person.personbuilder builder=new Person.personbuilder ("111", "Wanda Less", "male");
 * Here to select the optional parameter age hobby for example demo; * Person person=builder.setage. Sethobby ("reading")-build ();
    * * public class Person {* * * necessary parameters * ID number, name, sex * Declaration as private to avoid external unsafe modification/private String ID;
    private String name;
    Private String sex;
    * * Optional Parameters * age, telephone, hobby, address, educational background;/private int ages;
    Private String phone;
    Private String hobby;
    Private String addr;
    Private String major;
     * * * The Person class private constructor, why use a private constructor.
    	* * Private person (Personbuilder builder) {this.id=builder.id;
    	This.name=builder.name;
    	This.sex=builder.sex;
    	This.age=builder.age;
    	This.phone=builder.phone;
    	This.hobby=builder.hobby;
    	THIS.ADDR=BUILDER.ADDR;
    This.major=builder.major; * * * Call Setter,getter method to get change Private member */public void setId (String ID) {this.id=id;
	Public String GetId () {return id; * * * This personbuilder is specifically used to create a person object, * So the Personbuilder class is subordinate to the person class. Therefore, the use of the * inner class can clearly express this subordination. Use the "Static" * inner class to create a Personbuilder object when no person object exists/public static class Personbuilde
        r{* * Necessary parameters * ID number, name, gender * * Private String ID;
        private String name;
        Private String sex;
        * * Optional Parameters * age, telephone, hobby, address, educational background;/private int ages;
        Private String phone;
        Private String hobby;
        Private String addr;
        Private String major; * * To have the client invoke the constructor using all the necessary parameters to get a Builder object/public Personbuilder (String id,string name,string Sex
        	) {this.id=id;
        	This.name=name;
        This.sex=sex;
        * * * Call the parameterless build method to create the Person object * Note that the person object is not created before the build method call, so there is no need to worry about the issue of early disclosure.
  Public person build () {      	Return to new person (this); 
         * * * Invokes a setter-like method to set each of the relevant optional parameters * Here is the Personbuilder object, which makes it easy to set optional parameters in cascading mode, so that the hierarchy is clear and the code is simple
			* * Public personbuilder setage (int age) {this.age = age;
		return this;
			Public Personbuilder Setphone (String phone) {this.phone = phone;
		return this;
			Public Personbuilder sethobby (String hobby) {this.hobby = hobby;
		return this;
			Public Personbuilder setaddr (String addr) {this.addr = addr;
		return this;
			Public Personbuilder Setmajor (String major) {this.major = major;
		return this;
 }
        
    }
}