Web Reference: Dec 17, 2023 · In this article, we will learn about java.lang and java.util package with examples and also the difference between these two packages. The java.lang package in Java is a core package that includes the fundamental classes and features of Java language. Feb 9, 2026 · In this post I’ll show you a practical mental model for java.lang and java.util, what each package is meant to contain, and how to make clean choices when both could appear in the same feature. The java.lang and java.util packages provide basic functionality that is used by almost all applications. Other packages with names that begin with java.lang and java.util provide supplemental APIs for specific features.
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