J
Java & Backend
Core Java, collections, Spring, and backend interview prep.
1 free lessons2 premium
Course outline
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Java Core ConceptsFree
OOP, generics, streams, and concurrency basics.
7 lessons · 50 min · Beginner
Java Collections Deep DivePro
Lists, maps, sets, and interview favorites.
10 lessons · 1h 15m · Intermediate
Spring Boot Interview PrepPro
DI, REST, security, and production patterns.
16 lessons · 2h · Intermediate