java foundation 02: programming language and java language

1. The role of programming languages

2. Classification of programming languages

3. Advantages of java language

  1、垃圾回收等

URL link: https://blog.csdn.net/song123guoqiang/article/details/79818632
2. Cross-platform
reference URL: https://www.jianshu.com/p/aff011af5aac
Why Java can be cross-platform (jvm)
reference Website: https://www.cnblogs.com/zs6666/p/5861755.html