java 升级java版本命令如下：
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当前版本信息
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| 查java位置
root@v:~# whereis java
java: /usr/bin/java /usr/lib/java /usr/share/java /usr/share/man/man1/java.1.gz
查版本
root@v:~# /usr/bin/java -version
openjdk version "1.8.0_222"
OpenJDK Runtime Environment (build 1.8.0_222-8u222-b10-1ubuntu1~18.04.1-b10)
OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode)
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获取最新版本上传到服务器
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| 下载地址:
https://www.oracle.com/technetwork/java/javase/downloads/jdk11-downloads-5066655.html
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解压并重新替换软链接
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| mkdir -p /opt/jdk
tar -zxf jdk-11.0.5_linux-x64_bin.tar.gz -C /opt/jdk/
rm -f /usr/bin/java /usr/bin/javac
ln -s /opt/jdk/jdk-11.0.5/bin/java /usr/bin/java
ln -s /opt/jdk/jdk-11.0.5/bin/javac /usr/bin/javac
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确认升级成功
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| root@v:~
java version "11.0.5" 2019-10-15 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.5+10-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.5+10-LTS, mixed mode)
root@v:~
javac 11.0.5
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参考:
https://blog.csdn.net/keainanhaio/article/details/78659480
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