String Immutable - Explain

[sheelaprabu]

I Knew Java String is Immutable. Because we cannt change the value of String
object when it was created. explain with one code . thank you

[JosAH]

I Knew Java String is Immutable. Because we cannt change the value of String
object when it was created. explain with one code . thank you

A lot of String instantiations share their char[] data buffer without knowing who their
co-owners of the buffer are. Changing the buffer would result in changing all the
co-owners' buffers and result in a mess.

kind regards,

Jos

[BigDaddyLH]

I Knew Java String is Immutable. Because we cannt change the value of String
object when it was created. explain with one code . thank you

Explain what?

* The definition of "immutable"?
* The design decision that String ought to be immutable?
* How String's API demonstrates string is immutable?

[gaya3]

Explain what?

* The definition of "immutable"?
* The design decision that String ought to be immutable?
* How String's API demonstrates string is immutable?

Hi,
I have some explanation to answer your query..
i) Definition of "immutable": "immutable" means "unchange" or "not able to change".
ii)String ought to be immutable:
please try out the following example..it explains good...

class String_immutable{
         public sttaic void main(String args[]){
          String s1 = new String("StringValue");
          StringBuffer s2 = new StringBuffer("String buffer value");
          s1.replace('a','b');
          s2.replace(0,2,"zzz");
          System.out.println("\n String value after replace "+s1+"  String buffer  
                                      after replace  "+s2);
        }
    }

From above v clearly understand that "String" values are immutable and where as "String buffer" values are mutable.

iii) Api's:
you may try out with any API's . for better understanding "replace()" can be used..

-Thanks & Regards,
Hamsa

[sukatoa]

Hi,
I have some explanation to answer your query..
i) Definition of "immutable": "immutable" means "unchange" or "not able to change".
ii)String ought to be immutable:
please try out the following example..it explains good...
class String_immutable{
public sttaic void main(String args[]){
String s1 = new String("StringValue");
StringBuffer s2 = new StringBuffer("String buffer value");
s1.replace('a','b');
s2.replace(0,2,"zzz");
System.out.println("\n String value after replace "+s1+" String buffer
after replace "+s2);
}
}
From above v clearly understand that "String" values are immutable and where as "String buffer" values are mutable.

iii) Api's:
you may try out with any API's . for better understanding "replace()" can be used..

-Thanks & Regards,
Hamsa

Please use code tags, this thread might be useful for future members

Sukatoa ;-)