Java APIs and Standard Libraries 📚

Intermediate

Java provides an extensive set of libraries and APIs that simplify development tasks.

Core APIs include:

  • java.lang — fundamental classes like String, Math, Object.
  • java.util — collections framework (ArrayList, HashMap), date/time utilities.
  • java.io — input and output streams for file handling.
  • java.net — networking capabilities.
  • java.sql — database connectivity.

These libraries provide pre-built functions, enabling developers to focus on business logic.

Example: Using ArrayList:

import java.util.ArrayList;

ArrayList<String> list = new ArrayList<>();
list.add("Java");
list.add("Python");
System.out.println(list);

Leveraging APIs accelerates development and promotes code reuse, ensuring robustness and efficiency.