Set

Lesson in the Java Roadmap · Stage 11: Regular Expressions

Last updated 14 September 2026

What is Set?

A Set is a data structure that stores a collection of unique elements. This means that no duplicate values are allowed within a Set. Sets provide efficient ways to check for membership (if an element exists in the set) and perform operations like union, intersection, and difference.

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Free resources to learn Set

ArticleJava Set
ArticleJava Set Interface and Implementation

Set: common questions

Can I learn Set in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Set in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this Set tutorial for beginners?

It is lesson 43 of 86 in the free Java roadmap, in stage 11, Regular Expressions. If you are new to Java, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.