package Builder;
 
import java.util.ArrayList;
 
public abstract class AbstractProduct {
   
  //记录执行顺序
  private ArrayList<String> part = new ArrayList<String>();
   
  public abstract void doSomething();
   
  public abstract void doOtherthing();
   
  //final，子类不可重写
  final public void executive(){
    for(int i=0;i<this.part.size();i++){
      String actionName = this.part.get(i);
      if(actionName.equals("doSomething")){
        this.doSomething();
      }
      else if(actionName.equals("doOtherthing")){
        this.doOtherthing();
      }
    }
  }
   
  //final，子类不可重写
  final public void setPart(ArrayList<String> part){
    this.part = part;
  }
}

package Builder;
 
public class Product extends AbstractProduct{
 
    //子类具体描述步骤
  public void doSomething(){ 
    System.out.println("will do something...");
  }
   
  public void doOtherthing() {
    System.out.println("Something has done.Otherthing will be done...");
  }
}

package Builder;
 
import java.util.ArrayList;
 
public abstract class Builder {
   
  //设置产品的不同部分，以获得不同的产品 
  public abstract void setPart(ArrayList<String> part);
   
  //建造产品 
  public abstract Product buildProduct(); 
}

package Builder;
 
import java.util.ArrayList;
 
public class ConcreteProduct extends Builder{
   
  private Product product = new Product();
   
  public void setPart(ArrayList<String> part) {
    this.product.setPart(part);
  }
   
  public Product buildProduct() {
    return this.product;
  }
 
 
}

package Builder;
 
import java.util.ArrayList;
 
//对不同产品的生产顺序再封装，对高层屏蔽细节
public class Director {
  private ArrayList<String> part = new ArrayList<String>();
  private Builder builder = new ConcreteProduct();
   
  public Product getAProduct() {
    this.part.clear();
    this.part.add("doSomething");
    this.part.add("doOtherthing");
    builder.setPart(part);
    return builder.buildProduct();
  }
}

package Builder;
 
public class Client {
  public static void main(String[] args) {
    Director director = new Director();
    System.out.println("将产生10个产品");
    for(int i=1;i<11;i++){
      System.out.println("第" + i + "个产品");
      director.getAProduct().executive();
      System.out.println();
    }
  }
}