JAVA_HOME is an operating system (OS) environment variable which can optionally be set after either the Java Development Kit (JDK) or the Java Runtime Environment (JRE) is installed. The JAVA_HOME ...

CentOS系统，原来使用的是系统自带的openjdk1.7，后来我安装成了jdk1.6版本，而且把自带的openjdk删除了 问题是，我使用root用户 ...

For Java-based programs such as Maven, Jenkins, Gradle or Tomcat to run, they need to know that Java's JDK is installed. That's the purpose of the JAVA_HOME environment variable. It tells programs ...