Do I need to restart my system after setting JAVA in system environment's path variable? -

Do I need to restart my system after setting JAVA in system environment's path variable? -

i did next steps java not seem working me, need restart scheme if yes why?

1. right click computer->advence option->environment varibles->system variables 2. variable : path->edit 3. re-create jdk bin directory i.e.c:\program files\java\jdk1.7.0_51\bin 4. paste after putting semi-colon(;) in value section

i getting below error while running java in cmd

c:\users\user>java -version error: opening registry key 'software\javasoft\java runtime environment' error: not find java.dll error: not find java se runtime environment.

no, need close , recreate cmd windows, running java programs, or like.

to check it's correct, open new cmd window , type set -> review info path , java_home.

java java-home