Java在Linux中不起作用.为什么? [英] java is not working in linux. Why?

问题描述

当前正在使用Linux Cinnamon.我已经从本地驱动器上取消/删除了Open JDK.然后我通过终端检查了java -version并给出了-

Currently working on Linux Cinnamon. I have unistall/removed Open JDK from my local drive. Then I checked java -version via terminal and gives -

$ java -version
The program 'java' can be found in the following packages:
 * default-jre
 * gcj-5-jre-headless
 * openjdk-8-jre-headless
 * gcj-4.8-jre-headless
 * gcj-4.9-jre-headless
 * openjdk-9-jre-headless
Try: sudo apt install <selected package>

然后，按照安装指南为linux安装oracle jdk 8.然后，我通过[我只是将jdk解压缩为/opt/java]-

After that following the installation guide to install oracle jdk 8 for linux. Then I just checked java -version command through [I just unpack jdk to /opt/java]-

$ /opt/java/jdk1.8.0_112/bin/java -version
java version "1.8.0_112"
Java(TM) SE Runtime Environment (build 1.8.0_112-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.112-b15, mixed mode)

之后，我使用nano将我的环境变量JAVA_HOME="/opt/java/jdk1.8.0_112" [不包括bin]设置为/etc/environment

I set my environment variable JAVA_HOME="/opt/java/jdk1.8.0_112" [excluding bin] to /etc/environment using nano thereafter from JAVA_HOME setup tutorial -

# Java Home
JAVA_HOME="/opt/java/jdk1.8.0_112"
export JAVA_HOME

并刷新&检查我的JAVA_HOME如下-

and refresh & checked my JAVA_HOME as follows -

$ echo $JAVA_HOME
/opt/java/jdk1.8.0_112

这些设置完成后，当我尝试通过命令检查java -version时，它会给出-

After these setup while I am trying check java -version via command it gives -

$ java -version
The program 'java' can be found in the following packages:
 * default-jre
 * gcj-5-jre-headless
 * openjdk-8-jre-headless
 * gcj-4.8-jre-headless
 * gcj-4.9-jre-headless
 * openjdk-9-jre-headless
Try: sudo apt install <selected package>

谁能告诉我发生了什么事?

Can anyone tell me what is going on?

推荐答案

即使设置了$JAVA_HOME，您仍然需要在$PATH中添加bin:

Even once you set $JAVA_HOME, you still need to add bin to your $PATH:

export PATH="$PATH:$JAVA_HOME/bin"

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