What does java consist of?

Java is composed of four aspects: Java programming language, Java file format, Java Virtual Machine (JVM), and Java Application Programming Interface (Java API).

● Java programming language, that is, grammar.

Java is an object-oriented programming language. It not only absorbs the various advantages of the C language, but also abandons the concepts such as multiple inheritance and pointers that are difficult to understand in C. Therefore, the Java language has powerful functions and Simple and easy to use two features.

As a representative of static object-oriented programming languages, Java language perfectly implements object-oriented theory and allows programmers to perform complex programming with an elegant way of thinking.

● Java file format, that is, the suffix of various folders and files.

● Java Virtual Machine (JVM) is an interpreter that processes *.class files.

●Java Application Programming Interface (Java API).

Java is divided into three systems, namely Java SE (J2SE, Java2 Platform Standard Edition, Standard Edition), JavaEE (J2EE, Java 2 Platform, Enterprise Edition, Enterprise Edition), Java ME ( J2ME, Java 2 Platform Micro Edition, micro version).

Recommended learning: Java video tutorial

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