Varargs in java 6 having some problem

[sureshkumar settu]

Hi guys,
I an working in JAVA 6. We i do overloading a method with varargs, Only var args method is calling.

i.e.
I have two method
public Map<String> getData(String... field){}
public Map<String> getData(String field){}

i am calling like getData("suresh")

Always it uses varargs method i.e first method. Why i am not able to call second one?

Thanks,
suresh kumar

[Winston Gutkowski]

sureshkumar settu wrote:i am calling like getData("suresh")
Always it uses varargs method i.e first method. Why i am not able to call second one?

Seems odd to me. However, what you could try is swapping the methods around (ie, put the single String method first); I'm pretty certain that when the compiler can't make any clear choice it uses the definition order.

Winston

[Campbell Ritchie]

That looks the wrong way round; for a single argument you ought to execute the non-varargs version of those methods.

[Saifuddin Merchant]

Campbell Ritchie wrote:That looks the wrong way round; for a single argument you ought to execute the non-varargs version of those methods.

Surprised me too. So I tried it out quickly

package com.sam;

import java.util.Map;

public class Sample {

	public static void main(String[] args) {
		new Sample().getData("MyTest");
	}
	
	public Map<String, String> getData(String... field) {
		System.out.println("VarAgrs");
		return null;
	}
	
	public Map<String, String> getData(String field) {
		System.out.println("Normal");
		return null;
	}
}

Output

Normal

Working as expected!

[sureshkumar settu]

Thanks for the reply guys.

I tried whole day, that was not working on that day.

but today when i pass single argument then it is calling single argument version of method. I don't know how it is working now, nothing i have changed in my coding.

That class may not be compiled correctly. I don't know the exact reason.

what ever guys now i understand. JVM always prefer earlier version of calling mechanism.

thanks
suresh

[Jesper de Jong]

You probably had old *.class files that were being picked up.