在 Holub 的模式书中无法弄清楚这一点
我开始阅读 Holub 的模式书，不确定这是否是一个错误（第 59-61 页）。
他在清单 2-3 中
public interface Employee
{ void youAreFired();
}
public static class EmployeeFactory
{ private Factory() {}
public static Employee create()
{ return new Peon();
}
}
/* package*/ class Peon implements Employee
{ public void youAreFired()
{ //lots of code
}
}
使用了 Employee.Factory.create()。 Factory 不是 Employee 的内部类，那么如何使用它呢？
然后往下两页，他说 Employee.Factory 是一个单例。如何？我认为这是一个拼写错误，Factory或Employee.Factory实际上应该是EmployeeFactory。我希望我没有错过 Java 编程方面的专业知识！
I started reading Holub's pattern book and not sure if this is a mistake (pg 59-61).
He has in listing 2-3
public interface Employee
{ void youAreFired();
}
public static class EmployeeFactory
{ private Factory() {}
public static Employee create()
{ return new Peon();
}
}
/* package*/ class Peon implements Employee
{ public void youAreFired()
{ //lots of code
}
}
He is using Employee.Factory.create(). Factory is not a inner class of Employee, so how is using that?
Then two pages down he says Employee.Factory is a singleton. How? I think its a typo, Factory or Employee.Factory should actually be EmployeeFactory. I hope I am not missing something major in Java programming!
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是的，只有一个拼写错误：
建议的修复：
public static class EmployeeFactory=> 行public static class Factory在考虑上述修复后修改您所写的内容将导致清晰的愿景。
yeb there is single typo only:
Proposed fix:
the line
public static class EmployeeFactory=>public static class Factoryrevise what you wrote after considering above fix shall result in clearing the vision.
我敢打赌，在这两种情况下他都指的是“EmployeeFactory”。看起来只是一个错字。
I bet he just meant "EmployeeFactory" in both those cases. It looks like just a typo.