how should i improve my programming in java

Answer 1

by making codes of different kinds

Answer 2

https://www.sololearn.com/discuss/96845/?ref=app
https://www.sololearn.com/discuss/1091816/?ref=app
https://www.sololearn.com/discuss/435645/?ref=app

Answer 3

practice

Answer 4

try solving the challenges in Sololearn.

Answer 5

Make small projects. For example try to make your own version of a app or site you use.