using string

[sailaja vengala]

Hi all,

Can anybody please clarify me .

Are there any particular rules about using
String s =new String("S") and String s="S". when to use what?

Thank you

[Lakshmanan Arunachalam]

Always better to use
String s = "S";//Line 1 rather than
String s = new String("S"); //Line 2

Reason :

Line 2 will always create a new String object containing a value "S", while Line 1 wont create a String object of "S", if a String object with value "S" is already in the pool.

[Purujit Saha]

String s1="abc"; this statement will create a String object into heap & store a reference of this object into StringPool.
so,
Whenever you write ,
String s2="abc"; this statement will not create any object again & it will simply refer the String object that has a reference in StringPool having the same content.

Now, When you write,
String s3=new String("abc"); now you are telling the compiler to implicitly create a String Object.

If you want s3 to refer the first object s1, you have to use s3.intern();


So, For performance point of view its better to create String Object using String literal.