interface as a method parameter in Java
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by PeterYu
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Published on 2010-04-04T18:21:43Z
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2010/04/04
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Hi all,
I had an interview days ago and was thrown a question like this.
Q: Reverse a linked list. Following code is given:
public class ReverseList {
interface NodeList {
int getItem();
NodeList nextNode();
}
void reverse(NodeList node) {
}
public static void main(String[] args) {
}
}
I was confused because I did not know an interface object could be used as a method parameter. The interviewer explained a little bit but I am still not sure about this. Could somebody enlighten me?
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