生成器模式[builder]

将一个复杂对象的构建与它的表示分离,使得同样的构建过程可以创建不同的表示.

 

public class Client {
	public static void main(String[] args) {
		BuilderA builder = new BuilderA();
		Director director = new Director(builder);
		director.construct();
		Product product = builder.getResult();
		System.out.println(product);
	}
}