Installing Java in Windows 10

Setting Environment Variables

C:\Windows\system32>setx JAVA_HOME "C:\Program Files\Java\jdk1.8.0_152"
SUCCESS: Specified value was saved.

C:\Windows\system32>setx CLASSPATH "C:\Program Files\Java\jdk1.8.0_152\lib"
SUCCESS: Specified value was saved.

C:\Windows\system32>setx MAVEN_HOME "C:\opt\apache-maven-3.8.6"
SUCCESS: Specified value was saved.

Note: Adding /M setx /M JAVA_HOME "C:\Program Files\Java\jdk1.8.0_152" is considered as System Variable. Therefore if you wanted to set it as User Variable then remove /M and execute the command.

Checking JAVA & MAVEN Home Path

C:\Users\murugkar>echo %JAVA_HOME%
C:\Program Files\Java\jdk1.8.0_152

C:\Users\murugkar>echo %MAVEN_HOME%
C:\opt\apache-maven-3.8.6

C:\Users\murugkar>echo %CLASSPATH%
C:\Program Files\Java\jdk1.8.0_152\lib

Checking Java Version and Maven Version

Note: The below output indicates that we are using Oracle Java. Oracle during the last few years restricted the free use of their Java.

C:\Users\murugkar>mvn -version
Apache Maven 3.8.6 (84538c9988a25aec085021c365c560670ad80f63)
Maven home: C:\opt\apache-maven-3.8.6
Java version: 1.8.0_152, vendor: Oracle Corporation, runtime: C:\Program Files\Java\jdk1.8.0_152\jre
Default locale: en_US, platform encoding: Cp1252
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"

C:\Users\murugkar>java -version
java version "1.8.0_333"
Java(TM) SE Runtime Environment (build 1.8.0_333-b02)
Java HotSpot(TM) 64-Bit Server VM (build 25.333-b02, mixed mode)

Java version: 1.8.0_152

cacerts is where Java stores Public certificates of root CA’s. Java uses cacerts to authenticate to the servers. Keystore is where Java stores the Private keys of the clients so that it can share it to the server when the server requests client authentication.

Note: The initial password of the cacerts keystore file is changeit.

To List All Certificates from Java Keystore

keytool -list -v -keystore "%JAVA_HOME%\jre\lib\security\cacerts" -storepass changeit

To Export Certificate from Java Keystore

keytool -export -alias "digicertassuredidg3 [jdk]" -keystore "C:\Program Files\Java\jdk1.8.0_333\jre\lib\security\cacerts" -rfc -file C:\Users\murugkar\digi_cert -storepass changeit

To Import Certificate into Java Keystore

keytool -importcert -alias "digicertassuredidg3 [jdk]" -file C:\Users\murugkar\digi_cert -keystore "C:\Program Files\Java\jdk1.8.0_152\jre\lib\security\cacerts" -storepass changeit

To Delete Certificate from Java Keystore

keytool -delete -alias "digicertassuredidg3 [jdk]" -keystore "C:\Program Files\Java\jdk1.8.0_152\jre\lib\security\cacerts" -storepass changeit

Note: To import or to delete certificate from the keystore, we need to execute the command from Elevated Prompt.

SSL Certificate Guide

When we establish a connection over HTTPS, the web server will respond by providing its site and intermediate certificates. It is then up to the client to complete the chain by having the root certificate. This chain validation is necessary for the client to trust the site.

Since Chrome has the root certificate GeoTrust Global CA in its certificate store, our connection succeeds and we are not presented with any errors or warnings.

Note: There may be more than one intermediate certificate in the chain depending on the site.