Java exercises test a stated behavior with accepted inputs, rejected inputs and checks that fail when the behavior is violated.
Learning roadmap
Solve small tasks, then compare against an example answer. Open a topic below, try its example, then check the result.
What comes next
Use the subject bar to move between the tutorial, advanced topics and practice resources. Each section has its own module list. This section links 10 written lessons and self-checks. The coverage map records the remaining scope; this curriculum is not an exhaustive Java reference.
Working through this section
The curriculum below groups the canonical pages for this section. Open a lesson to see its release label, operation contract and connected topics. Examples can also be linked from another section without creating a second copy of the same page.
Compile the stated program with a compatible JDK and compare its result with the displayed output. Read the rejected-input and ownership clauses before changing the input. Local self-checks and downloaded programs do not imply a server-side code judge or a production service.