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Oracle Certified Professional: Java SE Developer 1Z0-831 (Java SE 25) · Domain 10: Implementing localization

Formatting numbers and currency with NumberFormat

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Last reviewed September 25, 2026 · Leer en español

Different regions write numbers differently. The value one thousand two hundred thirty-four and a half is written 1,234.5 in the US, 1.234,5 in Germany and with a space as the grouping separator in France. java.text.NumberFormat handles these rules. It is abstract; you get an instance from a factory method, passing a Locale or relying on the default.

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