Runtime / Compile Time Behaviour

[Grant Malcom]

Hi, EveryBody
Here is the Code , for Which i need some Explanation....

  
class A{
        void print(Object obj){
		System.out.println("Object!");
	}
	void print(String obj){
		System.out.println("String!");
	}
	void print(Integer obj){
		System.out.println("Integer");
	}
       public static void main(String[] args) {
		new A().print(null);
	}
}
  

Now I get a Compile Error, at line# 13, Also, when the Method print with Integer Parameter is commented, then Program runs Fine, printing - String!, ( Why Not Object! was Printed )

Can Any one Explain the Behavior, is it anything to do with Runtime Polymorhisim.

Thanks in Advance!

[Ankur kothari]

wait....letme give you a link which will explain it to you

[Ankur kothari]

http://faq.javaranch.com/java/ScjpFaq#mostSpecific

[Ankur kothari]

so this means that between String and object, String will be chosen as String extends object....now even Integer extends Object so now compiler is confused whether to chose String or Integer so you get an ambiguous error

i hope this clears it all

[Ankur kothari]

sorry
its
http://faq.javaranch.com/java/ScjpFaq#mostSpecific