写一段Java代码 ConcreteBulilder类中的三个方法：buildPartA、buildPartB、buildPartC分别调用product的setPartX(X代表A、B、C） yiwen 2023/5/16 19:11:56 Director类中，包含构造函数与setBuilder(参数）方法 yiwen 2023/5/16 19:16:30 主类定义为Client，主要代码有： Builder builder=new ConcreteBuilder(); Director director=new Director(builder); Product product=director.construct(); 然后最后可以调用product的getXXX方法，并输出相关属性值；

下面是Java代码实现：

public interface Builder {
    void buildPartA();
    void buildPartB();
    void buildPartC();
    Product getProduct();
}

public class ConcreteBuilder implements Builder{
    private Product product;

    public ConcreteBuilder() {
        this.product = new Product();
    }

    @Override
    public void buildPartA() {
        product.setPartA("Part A");
    }

    @Override
    public void buildPartB() {
        product.setPartB("Part B");
    }

    @Override
    public void buildPartC() {
        product.setPartC("Part C");
    }

    @Override
    public Product getProduct() {
        return product;
    }
}

public class Director {
    private Builder builder;

    public Director(Builder builder) {
        this.builder = builder;
    }

    public void setBuilder(Builder builder) {
        this.builder = builder;
    }

    public Product construct() {
        builder.buildPartA();
        builder.buildPartB();
        builder.buildPartC();
        return builder.getProduct();
    }
}

public class Client {
    public static void main(String[] args) {
        Builder builder = new ConcreteBuilder();
        Director director = new Director(builder);
        Product product = director.construct();

        System.out.println("Part A: " + product.getPartA());
        System.out.println("Part B: " + product.getPartB());
        System.out.println("Part C: " + product.getPartC());
    }
}

public class Product {
    private String partA;
    private String partB;
    private String partC;

    public String getPartA() {
        return partA;
    }

    public void setPartA(String partA) {
        this.partA = partA;
    }

    public String getPartB() {
        return partB;
    }

    public void setPartB(String partB) {
        this.partB = partB;
    }

    public String getPartC() {
        return partC;
    }

    public void setPartC(String partC) {
        this.partC = partC;
    }
}

在主函数中，我们首先创建一个ConcreteBuilder实例，并将其传递给Director构造函数中。接下来，我们通过director调用construct方法创建Product对象，并最终输出各部分的属性值。最终输出结果如下：

Part A: Part A
Part B: Part B
Part C: Part C