【Linux】配置查看JAVA_HOME
转载自:https://www.jianshu.com/p/f46f99de173a
=========
问题背景
echo $JAVA_HOME
无输出java -version
有jdk,故需配置java_home
配置步骤
||▶ 键入which java
![](https://img2023.cnblogs.com/blog/1656313/202302/1656313-20230227162836054-460266585.png)
||▶ 键入ls -lr /usr/bin/java
![](https://img2023.cnblogs.com/blog/1656313/202302/1656313-20230227162845157-790580009.png)
||▶ 键入ls -lrt /etc/alternatives/java
得到java安装目录:
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.342.b07-1.el7_9.x86_64
||▶ 打开配置文件:vi /etc/profile
新增配置:
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.342.b07-1.el7_9.x86_64 export JRE_HOME=$JAVA_HOME/jre export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
:wq保存退出
||▶ 配置生效:source /etc/profile
||▶ 测试:echo $JAVA_HOME
![](https://img2023.cnblogs.com/blog/1656313/202302/1656313-20230227162946185-362076066.png)