Difference between String and String Builder

Question

Accepted Answer

String is immutable, StringBuilder is mutable.

String is a sequence of characters stored in the heap memory.
String Builder is a mutable sequence of characters stored in the heap memory.
String objects are immutable, meaning their values cannot be changed once created.
String Builder objects are mutable, meaning their values can be changed after creation.
String concatenation creates a new String object each time, which can be inefficient.
String Builder is more efficient for concatenating multiple strings.
String methods return a new String object, while StringBuilder methods modify the existing object.
Use String when the value will not change frequently, and StringBuilder when frequent modifications are required.

Accepted Answer

A String is immutable in Java, while a StringBuilder is mutable in Java. An immutable object is an object whose content cannot be changed after it is created.

Difference between String and String Builder

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