ubuntu下配置java，gradle，groovy环境变量

1. 下载

到官网下载各自对应的压缩包并解压。注意，如果提前用AndroidStudio下载了gradle，那么可以直接在~/.gradle/wrapper/dists/下找到已经下载了的gradle。

2.配置

命令行

1. 用gedit打开profile配置文件

$ sudo gedit /etc/profile

2. 拉倒最底部，依次根据自己的下载路径加入如下配置

# set java environment
export JAVA_HOME=/home/william/下载/jdk-8u181-linux-x64/jdk1.8.0_181
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

# set gradle environment
export GRADLE_HOME=/home/william/.gradle/wrapper/dists/gradle-4.6-all/bcst21l2brirad8k2ben1letg/gradle-4.6
export PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin:${GRADLE_HOME}/bin:${JAVA_HOME}:${PATH}

# set groovy environment
export GROOVY_HOME="/home/william/公共的/apache-groovy-sdk-2.5.3/groovy-2.5.3"
export PATH=$GROOVY_HOME/bin:$PATH

3. 保存，查验

$ java -version
java version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)

$ gradle -version

------------------------------------------------------------
Gradle 4.6
------------------------------------------------------------

Build time:   2018-02-28 13:36:36 UTC
Revision:     8fa6ce7945b640e6168488e4417f9bb96e4ab46c

Groovy:       2.4.12
Ant:          Apache Ant(TM) version 1.9.9 compiled on February 2 2017
JVM:          1.8.0_181 (Oracle Corporation 25.181-b13)
OS:           Linux 4.15.0-38-generic amd64

$ groovy -version
Groovy Version: 2.5.3 JVM: 1.8.0_181 Vendor: Oracle Corporation OS: Linux