centos7下查询java安装路径

[root@localhost bin]# which java
/usr/bin/java
[root@localhost bin]# ls -lrt /usr/bin/java 
lrwxrwxrwx. 1 root root 22 8月   8 14:23 /usr/bin/java -> /etc/alternatives/java
[root@localhost bin]# ls -lrt /etc/alternatives/java
lrwxrwxrwx. 1 root root 73 8月   8 14:23 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.141-1.b16.el7_3.x86_64/jre/bin/java
[root@localhost ~]# which java
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.141-1.b16.el7_3.x86_64/jre/bin/java
[root@localhost ~]# echo $JAVA_HOME
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.141-1.b16.el7_3.x86_64
[root@localhost ~]# echo $PATH
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.141-1.b16.el7_3.x86_64/bin:/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.141-1.b16.el7_3.x86_64/jre/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/bin:/root/bin
[root@localhost ~]#