Java OCP 21 (1Z0-830) | Handling Values 1.11 | Compact Number Formatting (Java 12+)
Java OCP 21 Exam (1Z0-830) — Handling Values Series
Video 1.11 : Compact Number Formatting (Java 12+)
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In this video you will learn:
✅ Why Compact Number Formatting exists — the real-world problem it solves
✅ NumberFormat.getCompactNumberInstance() — the factory method
✅ NumberFormat is in java.text package — not java.util or java.math
✅ Two arguments — Locale and NumberFormat.Style
✅ Locale.US — American English number representations
✅ NumberFormat.Style.SHORT → "1K", "1M", "1B"
✅ NumberFormat.Style.LONG → "1 thousand", "1 million", "1 billion"
✅ Numeric literal separators — 1_000 is the same as 1000
✅ cf.format(1_000) → "1K"
✅ cf.format(1_000_000) → "1M"
✅ Rounding behaviour — cf.format(1_500) → "2K" not "1K"
✅ Why 1_500 rounds to 2K — half-up rounding explained
✅ LONG style — cfLong.format(1_000) → "1 thousand"
✅ Return type is NumberFormat — not a compact-specific subclass
✅ This completes the Handling Values module
🎯 OCP 21 Exam Objective:
"Use primitives and wrapper classes. Evaluate arithmetic expressions
using the Math API, applying precedence rules, type conversions and casting"
📺 Full OCP 21 Handling Values playlist:
• COMPLETE Java fundamentals and Java OCP 21...
⬅ Previous — DateTimeFormatter — Formatting & Parsing
➡ Next module — Controlling Program Flow
📝 Practice Questions:
👉 OCA 8 (1Z0-808): https://javalearn.clustermicro.com — Live now
👉 OCP 21 (1Z0-830): https://javaocp.clustermicro.com — Coming Soon
📧 Early access: [email protected], / arup-basu-204275184
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