How I can practice java without laptop?

Question

please tell me

Answer 1

Google codes online made with Java, read and understand. You also can get an editor for androids/iOS, and compile it on sololearn (copy&pasting).

Answer 2

an app called aide
offline and powerful
you can also learn and practice algorithm to get good at basic and code easier

Answer 3

Java deserves laptop.period. buy a laptop