一个类的所有父类 [英] All parent classes of a class

问题描述

我怎样才能找到一个类的所有父类的列表，比如class1。

我想要一个用Java编码的这个类class1的所有父类的列表。

有什么方法???

解决方案

你需要使用Java 反射：

http://en.wikipedia.org/wiki/Reflection_%28computer_programming%29#Java [ ^ ]。



您需要使用： http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html#getSuperclass%28%29 [ ^ ]。



如果你真的是指课程（不是interfac es或泛类），请记住，在Java中只支持单一继承（更准确地说，当你考虑接口时，一个类可以实现任意数量的接口;这种形式的多重继承有时被称为多重继承的弱形式）。所以，你需要进行链计算：为某个类找到一个超类，然后找到它的超类，一直向上到公共根类 java.lang.Object 。



有关所有相关细节，请参阅上面引用的整篇文章。







回答后续问题：

http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html# isAssignableFrom％28java.lang.Class％29 [ ^ ]。

-SA

How could I find list of all parent classes of a class, say class1.
I want a list of all parent classes of this class class1 that I have coded in Java.
Is there any way???

解决方案

You need to use Java reflection:
http://en.wikipedia.org/wiki/Reflection_%28computer_programming%29#Java[^].

You need to use: http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html#getSuperclass%28%29[^].

If you really mean "classes" (not interfaces or generic classes), keep in mind that in Java only singular inheritance is supported (more exactly, when you take into account also interfaces, a class can implement any number of interfaces; this form of multiple inheritance sometimes is called weak form of multiple inheritance). So, you need to do the chain calculation: find a super class for some class, then its super class, all the way upward to the common root class java.lang.Object.

For all related detail, please see the whole article referenced above.

[EDIT]

In response to a follow-up question:
http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html#isAssignableFrom%28java.lang.Class%29[^].

—SA

这篇关于一个类的所有父类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！