第十三章 建造者模式

import java.util.LinkedList;
import java.util.List;

/**
* Created by hero on 16-4-3.
*/
public class Product {
private List<String> parts = new LinkedList<>();

public void add(String part) {
parts.add(part);
}

public void show() {
for (String p : parts) {
System.out.print(p + "\t");
}
System.out.println();
}
}
/**
* Created by hero on 16-4-3.
*/
public abstract class Builder {
public abstract void buildPartA();

public abstract void buildPartB();

public abstract Product getResult();
}
/**
* Created by hero on 16-4-3.
*/
public class ConcreteBuilder1 extends Builder {
private Product product = new Product();

@Override
public void buildPartA() {
product.add("a");
}

@Override
public void buildPartB() {
product.add("b");
}

@Override
public Product getResult() {
return product;
}
}
/**
* Created by hero on 16-4-3.
*/
public class ConcreteBuilder2 extends Builder {
private Product product = new Product();

@Override
public void buildPartA() {
product.add("x");
}

@Override
public void buildPartB() {
product.add("y");
}

@Override
public Product getResult() {
return product;
}
}
/**
* Created by hero on 16-4-3.
*/
public class Director {
public void Construct(Builder builder) {
builder.buildPartA();
builder.buildPartB();
}
}
public class Main {

public static void main(String[] args) {
Director director = new Director();
ConcreteBuilder1 concreteBuilder1 = new ConcreteBuilder1();
ConcreteBuilder2 concreteBuilder2 = new ConcreteBuilder2();
Product product = null;
director.Construct(concreteBuilder1);
product = concreteBuilder1.getResult();
product.show();
director.Construct(concreteBuilder2);
product = concreteBuilder2.getResult();
product.show();
}
}