Collection

[meeta gaur]

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

class Conversion
{
	public static void main(String[] args) 
	{
		Set<String> stringSet=new HashSet<>();
		stringSet.add("b");
		stringSet.add("c");
		stringSet.add("a");
		stringSet.add("d");

		Object[] obj=stringSet.toArray();

		for(Object o:obj)
			System.out.println((String)o);
		
		obj[0]="e";
		System.out.println("--------------");
		

		String[] s=new String[4];
		s=stringSet.toArray(s);
		
		for(String ss:s)
			System.out.println(ss);
		
	}
}

d
b
c
a
--------------
d
b
c
a

why doesn't

obj[0]="e";

reflect on stringSet ?

[Winston Gutkowski]

meeta gaur wrote:why doesn't

obj[0]="e";

reflect on stringSet ?

Why would you think it does? Nothing in the documentation says the result of toArray() is connected with the collection it was called on.

Winston

[meeta gaur]

Winston Gutkowski wrote:

meeta gaur wrote:why doesn't

obj[0]="e";

reflect on stringSet ?

Why would you think it does? Nothing in the documentation says the result of toArray() is connected with the collection it was called on.

Winston

Because it happens in case of Arrays.asList().That's why i thought same.