Logomenu
shrug

Do you need help with

hashmap，把每个str sort一下最后hashmap 编程list<list<>>的时候可以这样new ArrayList<List<String>>(map.values());

Then try StudyFetch, the AI-powered platform that can answer your questions and teach you more about it!

arrowarrow
Learn The Answer

How StudyFetch Helps You Master This Topic

AI-Powered Explanations

Get in-depth, personalized explanations on this topic and related concepts, tailored to your learning style.

Practice Tests

Take adaptive quizzes that focus on your weak areas and help reinforce your understanding of the subject.

Interactive Flashcards

Review key concepts and terms with AI-generated flashcards, optimizing your retention and recall.

Educational Games

Engage with fun, interactive games that reinforce your learning and make studying more enjoyable.

Start mastering this topic and many others with StudyFetch's comprehensive learning tools.

Get Started Now

What is Study Fetch?

feature

Notes AI

Create notes from your course material in seconds.

feature

Flashcards AI

Make flashcards from your course material with a single click.

feature

Quizzes AI

Create and practice with quizzes from your course material.

feature

Spark.E AI

Talk to your personal AI tutor and learn in real time!

feature

Spark.E Visuals

Ask questions about pictures and diagrams from your notes!

feature

Record Live Lecture

Take notes and ask questions in real-time, without touching your computer!

feature

Essay Grader

Grade your essays and get personalized feedback and suggestions!

feature

Tutor Me

Get taught an entire lecture about your course material from Spark.E!

study fetcharrow
Ready To ace that test?

Sign up to revolutionize your learning.

Try it outarrowarrow