Lisa Notes

Jun 25, 2026 · Fundamentals

Java Basics: Numbers, Characters, and String Handling – Day 53 Learning Notes

This tutorial walks through Java's core numeric and character utilities, covering number wrapper classes and autoboxing/unboxing, the Number hierarchy, formatted output with printf/format, DecimalFormat patterns, and the Math class’s constants and methods for arithmetic, logarithmic, trigonometric, and random number generation, all illustrated with concrete code examples.