Question

I have refernced the following links

What is String pool in Java?

Garbage collection and Strings

http://www.xyzws.com/Javafaq/what-is-string-literal-pool/3

Questions about Java's String pool

Still have some doubts please help me

            `public class StrPool
             { 
               public static void main(String[] args)
               { 
                String abc="hello";
                String abcd="hello";
                System.out.println(abc==abcd);
               }
             }
             `

In the above example OP : true

So we can confirm that both object are refered from same String object Am clear about that.

    `String abc="hello World";
     String abcd="hello";
     System.out.println(abc==abcd);`

This gives output : false

So String pool is carried out when two String object having same literal???

If So two object of String will created in String pool??

Why second output is false ???

I READ THAT String class is immutable

abc and abcd have different object reference then Immutable means

” First String object will created by JVM and give two reference to abc and abcd ” Am i right???

Thank you very much……..

Answer 1

The second output is false as both the string abc and abcd having different content(text)

yes as you said String class is immutable ie their content does not gets changed, if in case you change the string text then JVM will allocate a new space instead of altering it.

Now when you create a new String reference with some text at that time JVM will check if that text already exists in pool and if then will refer your string to that text or else will create new text within pool