在命令行输入java -version(win 系统 和Linux的命令行自己开启)
1、如果Openjdk,输入 java -version显示的版本信息为
- [machao@dev ~]$ java -version
- openjdk version "1.8.0_144"
- OpenJDK Runtime Environment (build 1.8.0_144-b01)
- OpenJDK 64-Bit Server VM (build 25.144-b01, mixed mode)
- C:\Users\mch>java -version
- java version "1.7.0_60"
- Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
- Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)