Differences between Java and C

1. Java does not have preprocessing commands. (For example, # define, # include, # ifdef, etc. in C ). The constant definition in C is replaced by static final in Java.

2. Java does not contain global variables in C.

3. The size of the main type in Java is determined, and the size of the main type in C is related to the platform.

4. Java does not have a pointer. It uses a similar handle to replace the pointer. However, Java does not allow addition or subtraction of the handle, and there is no such thing as an address operator.

5. Java has a garbage collection mechanism, so you do not need to release the space yourself.

6. Java does not have a goto statement. Java adds Exception Handling and label break and continue statements based on the control statements provided by C. These functions can replace goto.

7. C requires that the definitions of all local variables used in a method or block be defined at the beginning of the method or block, and Java allows these definitions to appear anywhere in the method or block.

8. Java does not require you to define a function before calling it. It can be defined after the call point. C has this requirement.

9. Java does not support the strut and union types in C. Java supports method overloading.

10. Java does not support the enum keyword in C.

11. Java does not support bitfields in C.

12. Java does not support C typedef.

13. Java does not support C method pointers.

14. Java does not support Variable Parameter tables of C.