Why data type size is differ in C and Java ??

Question

in C int=2byte
In Java Int=4bhte why...?

Answer 1

It must be due to java running on a virtual machine.

In Java, all data types (and every thing in fact) depends of the Java Virtual Machine (JVM) and not of the computer that run this JVM, so data size is fixed.

In C, data types are dependant of the computer that run them, and more specifically the compiler that you use, so it can change from one computer to another