Linux下如何查看JDK安裝路徑

1：echo $JAVA_HOME

使用$JAVA_HOME的話能定位JDK的安裝路徑的前提是配置了環境變量$JAVA_HOME，不然以下所示，根本定位不到JDK的安裝路徑

[root@localhost ~]# java -version

java version "1.7.0_65"

OpenJDK Runtime Environment (rhel-2.5.1.2.el6_5-x86_64 u65-b17)

OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)

[root@localhost ~]# echo $JAVA_HOME

2：which java

首先要申明一下which java是定位不到安裝路徑的。which java定位到的是java程序的執行路徑。那麼怎麼定位到java的安裝路徑呢？下面咱們來看看例子吧,以下所示：

 

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[root@localhost ~] # java -version java version  "1.7.0_51" OpenJDK Runtime Environment (rhel-2.4.5.5.el7-x86_64 u51-b31) OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode) [root@localhost ~] # which java /usr/bin/java [root@localhost ~] # ls -lrt /usr/bin/java lrwxrwxrwx. 1 root root 22 9月   6 22:51  /usr/bin/java  ->  /etc/alternatives/java [root@localhost ~] # ls -lrt /etc/alternatives/java lrwxrwxrwx. 1 root root 72 9月   6 22:51  /etc/alternatives/java  ->  /usr/lib/jvm/java-1 .7.0-openjdk-1.7.0.51-2.4.5.5.el7.x86_64 /jre/bin/java