How many objects are created in the following Strings in Java [duplicate]

Answer 1

Your first part of code:

2 objects are created. If "Java" is not present in String Pool, a string is created and added there.

Your 2nd part of code:

2 objects are created and if neither "Java" nor "Ruby" are present in String Pool, both strings are created and added to it.

Your 3rd part of code:

one object created. and same condition is executed to add to String Pool.

Your 4th part of code:

Only one object created, if "Java" not present in String Pool. else no new object created.

Answer 2

String s1 = new String("Java");
String s2 = new String("Java");

It will create 2 objects in heap.

String s1 = new String("Java");
String s2 = new String("Ruby");

This will create 2 objects in heap.

String s1 = new String("Java");
String s2 = "Java";

This will create one object in heap for first line. For second line, it will check whether "Java" exists in string pool or not.If exists, it wont create a new string.It will return the reference to already existing string in pool

String s1 = "Java";
String s2 = "Java";

First line will check whether "Java" exists in string pool or not.If exists, it wont create a new string.It will return the reference to already existing string in pool. Second line will get the reference to already created string.So no new objects if "Java" exists or maximum one object