String class meaning

[charmy jain]

hi,

my question is :

String class is not java primitive type,right
it is one java class but use it same as primitive patteren,
like,
String s1 = "abc";
it does not give "nullpointerxaception"
why that exception not throws even we not use "new" keyword ?

pls, send me reply

thanks

[A Kumar]

Hi Rekha...


have a look at the API...for the function intern()...in java.lang.String


Regards

[Tauri Valor]

From white paper:

http://java.sun.com/docs/white/langenv/index.html


Although strings are Java programming language objects, Java compiler follows the C tradition of providing a syntactic convenience that C programmers have enjoyed with C-style strings, namely, the Java compiler understands that a string of characters enclosed in double quote signs is to be instantiated as a String object

[madhu cm]

Any string that you create in java will be a treated as object..... for example as
String str1 = "abc"; implicitly the string "abc" will be an object!!...
and also this is the short-hand form to create any immutable string .

you can create a string in two ways:
1) String str1 = "abc";
2) String str1 = new String("abc");

the difference is that , for the first , you are creating just only one object (i.e "abc") and for the second , you are creating two objects (i.e str1,a reference object and "abc");

thats it... you can use either way......

[Saket Barve]

the difference is that , for the first , you are creating just only one object (i.e "abc") and for the second , you are creating two objects (i.e str1,a reference object and "abc");

Madhu, are you saying that in the first case str1 reference object is not being created before its initialization?