Map IS-A Collection?

[Harry Henriques]

Can you explain why the instanceof operator doesn't return false?

Map map = new LinkedHashMap<String,S
if(map instanceof Collection)
         System.out.println("True?");
else
         System.out.println("false");    

output True?

[Ankit Garg]

Did you create a custom class named Collection??

[Jesper de Jong]

I tried this:

import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;

public class JavaRanch
{
	public static void main(String args[]) {
		Map map = new LinkedHashMap<String, String>();
		System.out.println(map instanceof Collection);
	}
}

It prints false.

Part of the code in line 1 of your example is cut off. What's supposed to be there?

[Himanshu Kansal]

Harry Henriques wrote:Can you explain why the instanceof operator doesn't return false?

Map map = new LinkedHashMap<String,S
if(map instanceof Collection)
         System.out.println("True?");
else
         System.out.println("false");    

output True?

Just for confirmation you can try fully qualifying Collection as java.util.Collection

[Ankit Garg]

Alread solved here...

[shukla raghav]

Map is not a consider a because it does not implement the Collection interface