Basic Java Knowledge

1. Software: A collection of computer data and instructions organized in a series of specific sequences

System software: Windows, Linux, Mac 、、、

Application software: QQ 、、、

Software development: Making software

2, Interactive way: Simply speaking, is the person and the computer communication way, currently includes the graphical interface, the command line way

3,java Cross-platform: rely on virtual machines for cross-platform (win virtual machine, Linux virtual machine, Mac virtual machine)

4,jdk:java Development Kit (Development Kit) = JRE + Java Development tools

Jre:java Runtime Environment (Java Runtime Environment) = JVM + Class Library

Basic Java Knowledge