Missing & Standalone Topics

J

Qubits of DPK

April 10, 2026

Core Java
Topics that needed separate dedicated pages:
  • Packages & Access Modifiers
  • Upcasting & Downcasting
  • Wrapper Classes
  • forEach Method
  • User Input (Scanner & BufferedReader)
Sector 1

Packages & Access Modifiers

Engage Module
Sector 2

Upcasting & Downcasting

Engage Module
Sector 3

Wrapper Classes in Java

Engage Module
Sector 4

forEach Method in Java

Engage Module
Sector 5

Generics in Java

Engage Module
Sector 6

Optional<T> in Java — Java 8 Feature

Engage Module
Sector 7

Immutable Classes in Java

Engage Module