public class Employee {

     public String name;

     public int age;

     public int salary;



     Employee withName(String name){

        this.name = name;

        return this;

     }



     Employee withAge(int age){

        this.age = age;

        return this;

     }



     Employee withSalary(int salary){

        this.salary = salary;

        return this;

     }

}





public class BuilderPatternTest {

     public static void main(String[] args) {

          Employee employee = new Employee().withName("John").withAge(25).withSalary(10000);

     }

}

public class BuggyBread {



   private String element1; // Make them private as it supports stronger encapsulation



   private String element2;



   private BuggyBread(String element1, String element2){ // Make it private so that it can only be used by Builder

      this.element1 = element1;

      this.element2 = element2;

   }



   public static class Builder { 

      // Create Builder as nested class as its only supposed to Build BuggyBread objects, 

      // Make it public so that it can be accessed from outside

      private String element1; // Make them private as it supports stronger encapsulation



      private String element2;



      Builder(){}; // We have to define this constructor if we need overloaded constructor too and need to initialize without arguments too



      Builder(BuggyBread buggybread){ // overloaded constructor to make things easy

         element1 = buggybread.element1;

         element2 = buggybread.element2;

      }



      Builder withElement1(String element1){ // Builder method to either populate elements or override ( if populated through overloaded constructor )

         this.element1 = element1;

         return this;

      }



      Builder withElement2(String element2){

         this.element2 = element2;

         return this;

      }



      BuggyBread build(){ // method to build BuggyBread object using final contents from Builder

         BuggyBread buggybread = new BuggyBread(element1,element2);

         return buggybread;

      }

   }

}