Kotlinlearncs.online LogoJava

385 Java questions for you to practice.

Switch to Kotlin

Hello, world!

Hello, Fall 2021!

System.out.println

Functions

Strings

null

Maps and Sets

Encapsulation

Static

Polymorphism

Throwing Exceptions

Using Interfaces

Implementing Interfaces

Linked Lists

Recursion

Trees and Recursion

Streams

Java
Kotlin