What is the difference between Java and C language

1. In terms of operation mode:

C language: The original C is process-oriented, that is, executed line by line.

JAVA: Absolutely object-oriented and executed by module.

(Supplement: Of course, in C and C#, C has also converted to object-oriented mode)

2. In terms of usage

C language : Pure C is generally used in embedded systems to write the lowest-level programs, because its language is the easiest to connect to the hardware. Can do: embedded low-level software, operating system, various function libraries, engine library software core code, server-side low-level tools.

JAVA: J2EE, J2SM, J2ME, anything. What you can do: Embedded mobile device application software development, web page background logic development, some desktop programs

C, JAVA can actually be used in various fields.

3. The syntax is different:

● C language can directly operate memory, but java cannot directly operate it;

● C language can encapsulate dynamic libraries, but java cannot;

● C Language code is not easy to cross-platform, and Java code is easy to cross-platform;

● C language has pointers, java does not have pointers;

● C language can directly operate the serial port, while java requires a third-party jar Package support;

● C language threads are more flexible, and Java threads have been encapsulated;

● The identifiers available in C are numbers, uppercase and lowercase letters, and underscores, but not numbers. Beginning; In addition to the three types of identifiers available in C, Java has one more dollar sign ($), which also cannot start with a number.

4. Other differences

● The compilation time of a single file java is faster than C language;

●java is written in C language;

● When JAVA is used for web development, there are already many established framework technologies, there is very little C language, and the underlying content needs to be processed, which is very difficult for developers who are not familiar with computer principles;

● There are too many open source packages for JAVA, but there are too few for C language, and there are not as many frameworks for certain business application fields as Java;

● JAVA can be cross-platform, but C language cannot.

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