The article directories
1, JDK 2, Maven 3, Gradle 4

A, the JDK
Two environment variables JAVA_HOME and CLASSPATH need to be configured:

va_home =D:\programs\jdk1.8 p>
%java_home % \>; %JAVA_HOME%\jre\bin; add classpath:
code> c>path =.; %JAVA_HOME%\lib\dt.jar; %JAVA_HOME% lib\tools.jar
Use java-version and javac-version determine if the creation was successful
Second, the maven
Increase MAVEN_HOME:
MAVEN_HOME = D: \ apache maven - 3.3.9
in the Path to increase again:
% MAVEN_HOME % \ bin
mvn-v
Third, gradle
Increase the GRADLE_HOME = D: \ gradle - 6.7.1
in the path to increase again:
% GRADLE_HOME % \ bin
gradle-v / code>
Four,