建造者模式-链式赋值

当参数多的时候可以使用建造者模式做链式赋值

public class House {
    private String basics;
    private String wall;
    private String roof;
    private House(HouseBulider houseBulider){
        basics = houseBulider.basics;
        wall = houseBulider.wall;
        roof = houseBulider.roof;
    }
   private static class HouseBulider{
       private String basics;
       private String wall;
       private String roof;

       public HouseBulider setBasics(String basics) {
           this.basics = basics;
           return this;
       }

       public HouseBulider setWall(String wall) {
           this.wall = wall;
           return this;
       }

       public HouseBulider setRoof(String roof) {
           this.roof = roof;
           return this;
       }
       public House bulider(){
           return new House (this);
       }
   }

    @Override
    public String toString() {
        return "House{" +
                "basics='" + basics + '\'' +
                ", wall='" + wall + '\'' +
                ", roof='" + roof + '\'' +
                '}';
    }

    public static void main(String[] args) {
        House bulider = new HouseBulider ().setBasics ("地基10米").setWall ("砌墙0.5米").setRoof ("屋顶5米").bulider ();
        System.out.println (bulider.toString ());
    }
}