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“javac”命令无法运行，我该怎么办？

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“javac”命令无法运行，我该怎么办？ 
$ file /etc/alternatives/java /etc/alternatives/javac
/etc/alternatives/java:  symbolic link to /usr/lib/jvm/java-11-openjdk-amd64/bin/java
/etc/alternatives/javac: broken symbolic link to /usr/lib/jvm/java-11-openjdk-amd64/bin/javac

答案1

我安装了 Oracle JDK，而不是 OpenJDK，但是使用这些命令来添加符号链接。

  1. 将其添加到路径中。

    export PATH="$PATH:/opt/java/jdk1.8.0_171/jre/bin"

  2. 创建符号链接。

    sudo update-alternatives --install "/usr/bin/java" "java" "/opt/java/jdk1.8.0_171/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/opt/java/jdk1.8.0_171/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/opt/java/jdk1.8.0_171/bin/javaws" 1
sudo update-alternatives --set java /opt/java/jdk1.8.0_171/bin/java
sudo update-alternatives --set javac /opt/java/jdk1.8.0_171/bin/javac
sudo update-alternatives --set javaws /opt/java/jdk1.8.0_171/bin/javaws

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