Linux openjdk 切换为java jdk
先配置完java环境变量
#当下是openjdk环境
[root@localhost jdk1.8.0_231]# java -version
openjdk version "1.8.0_201"
OpenJDK Runtime Environment (build 1.8.0_201-b09)
OpenJDK 64-Bit Server VM (build 25.201-b09, mixed mode)
#/usr/bin/java 为openjdk路径 ，/usr/local/jdk1.8/jdk1.8.0_231为自己安装的jdk
[root@localhost jdk1.8.0_231]# sudo update-alternatives --install /usr/bin/java java /usr/local/jdk1.8/jdk1.8.0_231/bin/java 300
[root@localhost jdk1.8.0_231]# sudo update-alternatives --install /usr/bin/javac javac /usr/local/jdk1.8/jdk1.8.0_231/bin/javac 300
#如果还不行
[root@localhost jdk1.8.0_231]# alternatives --config java
共有 2 个提供“java”的程序。
选项 命令
-----------------------------------------------
*+ 1 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.201.b02.el7_6.x86_64/jre/bin/java)
2 /usr/local/jdk1.8/jdk1.8.0_231/bin/java
按 Enter 保留当前选项[+]，或者键入选项编号：2
[root@localhost jdk1.8.0_231]# java -version
java version "1.8.0_231"
Java(TM) SE Runtime Environment (build 1.8.0_231-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.231-b11, mixed mode)