native methods

[josephine chen]

why might u define a method native?
1. to get to access h/w that java does not know about
2. to define a new datatype like unsigned integer
3. to write optimised code for performance in a
language such as c/c++--true
4 to overcome the limitation of the pvt scope
of amethod

[Anonymous]

I also think that Native methods are written in Non-Java code like C, C++ to get the advantages of these native code or to use an existing piece of code.
Correct me if I am wrong !!
Regards,
Milind

[gunjan]

I feel answer is 1. to get to access h/w that java does not know about
Gunjan

[Jim Yingst]

1 and 3 both look like good answers - good thing we can choose both.

[Anonymous]

Yaa, 1 and 3 are correct. I did some native programming where i called some piece of code written in C++.

[Anonymous]

If you wanna know more about native methods, here you go (Please note that it is not needed for SCJP exam)
In Java, it is possible to call a C/C++ program from a Java program and a Java program from C/C++ program. The first job can be done by declaring the Java method as native and give the implementation in C/C++.
To call a Java program from C/C++ program, you got to instantiate the 'Java Virtual Machine' and it can do all the things for you. The Invocation API has number of methods for interaction between the two programs.