Use of transient,strictfp,volatile,native and transient

[rahulrvyas_1985]

Dear all,

Please let me know what is the use of transient,strictfp,volatile,native and transient.
in which situation these keywords being used ???

please help me because m preparing for SCJP

Regards
Rahul Vyas

[graviton]

native is for methods not defined in java, but defined through a processor dependent dll. if you look at the sourcecodes of the IO-Classes in the java api, you'll see that several methods are defined as native, since they have to call the underlying system's dll's to do io operation.

transient is for attributes. it defines, in the case, that a class is serializable, that the transient attributes shall not be serialized.
so when you have a class:
class a implements serializable{
int a;
int b;
transient int sum;
}
and you serialize it, then the file will contain only the values for a and b, not for sum.

volatile is for variables of basic types, like int, byte, boolean or float. it defines, that an operation on that variable has to be atomar. it's a kind of synchronized for basic types and is applied on multithreaded applications.

[rahulrvyas_1985]

Thank you for your kind reply

Regards
Rahul Vyas