Web Reference: The java.lang package provides classes that are fundamental to the design of the Java programming language. It includes classes such as String, Integer, Thread, Runtime, and Exception. Jul 23, 2025 · Following are the Important Classes in Java.lang package : Boolean: The Boolean class wraps a value of the primitive type boolean in an object. Byte: The Byte class wraps a value of primitive type byte in an object. Character – Set 1, Set 2: The Character class wraps a value of the primitive type char in an object. We're not supposed to import any class of java.lang package explicitly as being included by default. This tutorial cum reference will take you through all the methods available in java.lang package using simple and practical example.
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