How does maven find Java compiler?

Question

I am new to learn maven by following this example given by sonatype\'s book.This is a simplest pom.xml file (works fine). But my question is, how does maven

Answer 1

If you go to this path, say with maven version 3.2.3

apache-maven-3.2.3-bin\apache-maven-3.2.3\bin

opne the mvn.bat, you can see below

@REM Maven2 Start Up Batch script

@REM Required ENV vars:

@REM JAVA_HOME - location of a JDK home dir

Clearly it picks JAVA_HOME, from your environment variables. Below code snippet from the file.

@REM ==== START VALIDATION ====
if not "%JAVA_HOME%" == "" goto OkJHome
:OkJHome
if exist "%JAVA_HOME%\bin\java.exe" goto chkMHome
:chkMHome
if not "%M2_HOME%"=="" goto valMHome

for issue, javax.servlet

    javax.servlet
    javax.servlet-api
    3.0.1
    provided

or whichever available

    javax.servlet
    servlet-api
    2.5
    provided