After learning java and js how long to build first app with it

Question

java and js app

Answer 1

Java and JS are used for completely different reasons.

Answer 2

Start doing your app and learning java and js along the way. it may save you some time.

Answer 3

depends on how fast your learning is.For me I'll say two months

Answer 4

develop while you learn

Answer 5

It depends on the type of your app and your ability to code.