In my java code, I have this line System.getProperty("java.home"). In some environments, this returns the same value as what has been set JAVA_HOME as environment variable.
But in some environments, System.getProperty("java.home") returns completely different value from JAVA_HOME.
So my question is what's the difference between java.home and JAVA_HOME from java perspective?
What i know from my research is JAVA_HOME is jdk installation path, java.home is jre installation path, but then why can't it match as jre can be part of jdk installation.