下文笔者讲述Linux中查看JDK的安装路径的方法分享，如下所示

实现思路:方式1：echo $JAVA_HOME 输出的值为java路径方式2：使用which 方法查找出java的安装包,which查找原理，依次找出java命令运行对应的软链接，依次找出最终的安装位置

 例:

[root@node0 ~]# java -version
java version "1.8.0_271"
Java(TM) SE Runtime Environment (build 1.8.0_271-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.271-b09, mixed mode)
[root@node0 ~]# echo $JAVA_HOME[root@node0 ~]# which java
/usr/bin/java
[root@node0 ~]# ls -lrt /usr/bin/java
lrwxrwxrwx. 1 root root 22 3月  12 16:16 /usr/bin/java -> /etc/alternatives/java
[root@node0 ~]# ls -lrt /etc/alternatives/java
lrwxrwxrwx. 1 root root 37 3月  12 16:16 /etc/alternatives/java -> /usr/java/jdk1.8.0_271-amd64/bin/java
[root@node0 ~]# ls -lrt /usr/java/jdk1.8.0_271-amd64/bin/java
-rwxr-xr-x. 1 root root 8712 9月  17 2020 /usr/java/jdk1.8.0_271-amd64/bin/java
[root@node0 ~]# cd /usr/java/jdk1.8.0_271-amd64/bin/
[root@node0 bin]# dir
appletviewer  idlj	 java	  javafxpackager  javapackager	jcmd	  jdb	 jinfo	jps	    jstack  jvisualvm	  orbd	      rmic	   schemagen   tnameserv  wsimport
ControlPanel  jar	 javac	  javah		  java-rmi.cgi	jconsole  jdeps  jjs	jrunscript  jstat   keytool	  pack200     rmid	   serialver   unpack200  xjc
extcheck      jarsigner  javadoc  javap		  javaws	jcontrol  jhat	 jmap	jsadebugd   jstatd  native2ascii  policytool  rmiregistry  servertool  wsgen