Need clarification on overloaded method?

[Thennam Pandian]

 
       static void test(Object obj) 
	{
		System.out.println(" Object ");
	}
	
	static void test(String obj) 
	{
		System.out.println(" String ");
	}       
 

if i call the above method using "test(null)", it is calling the method which takes String as a argument.

Can anybody explain me, how it is called?

[Martin Vanyavchich]

Java calls the method with the 'narrowest' type that you pass as an argument. String is more specific than Object.

package javaranch;

public class MethodOverloading {

  static void method(short b){
    System.out.println("short");
  }

  static void method(long b){
    System.out.println("long");
  }

  public static void main(String[] args){
    byte b = 1;
    short s = 2;
    int i = 3;
    long l = 4;

    method(b);
    method(s);
    method(i);
    method(l);
  }
}

this prints

short
short
long
long

[David Newton]

This should go into the FAQ if it hasn't already, as it seems to come up quite often.

[Muhammad Khojaye]

David Newton wrote:This should go into the FAQ if it hasn't already, as it seems to come up quite often.

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