Web Reference: Oct 10, 2025 · In Java, strings are immutable, meaning their values cannot be changed once created. If you try to modify a string (e.g., using concat () or replace ()), a new string object is created instead of altering the original one. In Java, Strings are immutable. An obvious question that is quite prevalent in interviews is “Why Strings are designed as immutable in Java?” James Gosling, the creator of Java, was once asked in an interviewwhen should one use immutables, to which he answers: He further supports his argument stating features that immutability provides, such as cac... Mar 14, 2014 · Because String is immutable so the value one string object is holding will never get changed which means its hashcode will also not change which gives String class an opportunity to cache its hashcode during object creation.
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