问一个java design的题# JobHunting - 待字闺中
h*m
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假设我有个abstract class，和两个不同的子类。根据enum type，决定生成哪个子类：
public abstract class Base {
enum type {c1, c2}
public Base(type){
switch case(c1) return Child1(xxx);
case(c2) return Child2(xxx);
}
}
public class Child1 extends Base
public class Child2 extends Base
可是具体生成instance的时候应该怎么做呢？下面这个语句会报错abstract class
cannot be instantiated:
Base newInstance = new Base(c1);
public abstract class Base {
enum type {c1, c2}
public Base(type){
switch case(c1) return Child1(xxx);
case(c2) return Child2(xxx);
}
}
public class Child1 extends Base
public class Child2 extends Base
可是具体生成instance的时候应该怎么做呢？下面这个语句会报错abstract class
cannot be instantiated:
Base newInstance = new Base(c1);
