linux 下查看java的安装路径

在linux下,如何找java的安装路径

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han@ubuntu:/etc$ whereis java 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

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export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java export PATH=$JAVA_HOME/bin:$PATH export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

　　然后,运行

1	source /etc/profile

　　查看JAVA_HOME环境变量

1 2	han@ubuntu:/etc$ echo $JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64

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han@ubuntu:/etc$ whereis java 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

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export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java export PATH=$JAVA_HOME/bin:$PATH export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

　　然后,运行

1	source /etc/profile

　　查看JAVA_HOME环境变量

1 2	han@ubuntu:/etc$ echo $JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64

来源：https://www.cnblogs.com/khstudy/p/11351254.html