linux 查看java的安装路径

在linux下,如何找java的安装路径

java:  /usr/bin/java  /usr/share/java  /usr/lib/jvm/java-8-openjdk-amd64/bin/java  /usr/share/man/man1/java .1.gz
han@ubuntu: /etc $  ls  -lrt  /usr/bin/java
lrwxrwxrwx 1 root root 22 4月   2 15:54  /usr/bin/java  ->  /etc/alternatives/java
han@ubuntu: /etc $  ls  -lrt  /etc/alternatives/java
lrwxrwxrwx 1 root root 46 4月   2 15:54  /etc/alternatives/java  ->  /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java

　　然后编辑/etc/profilewen文件,在文件末尾添加

export  PATH=$JAVA_HOME /bin :$PATH
export  CLASSPATH=.:$JAVA_HOME /lib/dt .jar:$JAVA_HOME /lib/tools .jar

　　然后,运行

source  /etc/profile

　　查看JAVA_HOME环境变量

/usr/lib/jvm/java-8-openjdk-amd64