Java overview, Java Overview

Java overview, Java Overview

Java is an object-oriented programming language that can write cross-platform application software. It is a Java programming language and Java platform (JavaSE, JavaEE, javaME.

Java is a pure object-oriented programming language.
Java features: Sun's explanation of the Java programming language is: java programming language is a simple, object-oriented, distributed, explanatory, robust, secure and system-independent, portable, high-performance, multi-thread, and dynamic language.
Java compilation and execution: first, compile the source code on the java platform into a binary bytecode (bytecode), and then explain the execution bytecode on virtual machines on different platforms, run in any system implementing this java platform. During runtime, the java interpreter on the java platform interprets and executes these bytecode, And the classes required during execution are loaded into the runtime environment at the link stage. Instead, I thought about the cross-platform feature of "one compilation and execution everywhere.