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. Jan 10, 2012 · An important point to note here is that, while the String object is immutable, its reference variable is not. So that's why, in the above example, the reference was made to refer to a newly formed String object. 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...
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