Web Reference: Definition and Usage The substring() method returns a substring from the string. If the end argument is not specified then the substring will end at the end of the string. Oct 11, 2025 · In Java, a String represents a sequence of characters used for storing and manipulating text. It is immutable and provides many built-in methods for operations like concatenation, comparison, and manipulation. The class String includes methods for examining individual characters of the sequence, for comparing strings, for searching strings, for extracting substrings, and for creating a copy of a string with all characters translated to uppercase or to lowercase.
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