string memory allocation

Question

which one is better

System.out.println(\"hello world\");

or

String s=\"hello world\";
System.out.println(s);

Answer 1

No difference.

But, if you were to compare

String s=new String("hello world");
System.out.println(s);

with

System.out.println("hello world");

Then there would be a potential difference, as the latter case would be a candidate for string internalisation, wheras the former would not.