Why doesn't the String class have to be specifically imported into a program?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Why doesn't the String class have to be specifically imported into a program?

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The String class addresses character strings. All string literals in Java programs, for example, "abc" , are carried out as occasions of this class. Strings are consistent; their qualities can't be changed after they are made. String cradles support impermanent strings. Since String objects are changeless they can be shared.

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