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java

Data types and variables

2 roles need it, 2 as coreUsually level 3: WorkingLearn with the tutor

Where it sits

Learn first

Types and variablesData types and their sizesPrimitive and reference typesType castingConstants. Final variables

This skill

Data types and variables

Leads to

The roles below put it to work directly.

Jobs that need it

What level 3 (Working) means

Uses it independently on the job. Level 4 (Strong): handles hard cases, reviews others.

Start learning

No lesson yet: the tutor teaches it in short steps, with checks as you go.

Find out where you stand

A free check, then a route that starts at your level.

Check my readiness

Learned alongside it

Access modifiersArithmetic operationsArrayArray vs ArrayListArraysBasic SyntaxBasics of OOPBuild tools

Data types and variables: common questions

What is Data types and variables?

Data types and variables is a skill in java, needed by 2 roles on BootSelf.

Which jobs need Data types and variables?

Backend Developer (Java, Spring Boot), Full Stack Developer (Java + React). Most ask for level 3 (Working): uses it independently on the job.

What should I learn before Data types and variables?

Types and variables, Data types and their sizes, Primitive and reference types, Type casting, Constants. Final variables.

How do I practise Data types and variables?

Check your readiness for free, then BootSelf builds a route and short daily learning loops: a little theory, checks on what you get wrong, then a small program.