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; } }为什么运行不了
时间: 2023-07-15 14:12:55 浏览: 81
这段代码运行不了的原因可能有很多,具体需要看出现的错误提示。但是可以先检查一下代码中是否缺少某些关键的部分,比如:
1. 没有导入必要的包或类库。
2. 类没有定义在正确的包中。
3. 没有实现接口或继承父类导致编译错误。
4. 变量或方法名拼写错误。
5. 缺少必要的构造函数或方法。
6. 某些变量没有初始化。
7. 某些变量或方法的访问权限不正确。
如果你能提供更详细的错误提示或代码上下文,我可以更具体地帮你找到问题所在。
相关问题
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:
```java
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
```
阅读全文