CODEWITHSUNDEEP
javastring
sumit
sumit

Reputation: 3710

Query about Java Heap space String Object Storage

I know that

String s1 = "test";
String s2 = new String("test");
System.out.println(s1==s2);  // false

in above snippet "test" String Object is created inside the String pool in java (s1 will be passed its reference) and a new String Object will be created in the heap space of the memory (s2 will be in heap sapce).

so will s2 String object be referring to the String pool's "test" String object internally or s2 keeps an altogether different "test" String Object in memory ?

what will be the effect if we somehow "test" String Object in String constant pool is removed ? will s2 still be having the value "test" ?

I know this topic has been touched a lot but none of the previous answers which i checked clarifies it.

please mention any sources if that has a better explanation.

Thanks in advance !

Upvotes: 1

Views: 69

Answers (2)

Dheeraj Rajput
Dheeraj Rajput

Reputation: 37

Here is the link to the Article by Corey McGlone

http://www.javaranch.com/journal/200409/Journal200409.jsp#a1

Upvotes: 1

Andy Turner
Andy Turner

Reputation: 140299

In the Java 8 source code, the String(String) constructor reuses the value field from the parameter.

Note that value is a char[], though, so the two string instances use the same underlying array, but s2 is not using the "test" itself internally, since that is a String, not a char[].

Upvotes: 2

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