how will I practise Java at pc.

Answer 1

u need a compiler for that.
Download a free Java compiler available on the net.

I think you have a misconception that Java and JavaScript are the same but please note they have nothing in common

Answer 2

use eclipse it's free

Answer 3

install jdk and set path for it and using cmd you will be able to practice java on pc

Answer 4

First of all java & JavaScript is different things.
If you want to practice JavaScript then you need nothing extra just text editor(notepad or notpad++)& web browser.
If you want to practice java then you need jdk(java development kit) which is available on oracle ifor free & text editor or ide like netbean or eclipse.