Can the content of a String object be changed after it is created?

In Java, objects of the String class are immutable. This means that once a string is created, its contents cannot be changed. Any operations that seem to modify the string (for example, concatenation) actually create a new String object.

Example:

String s = "Hello";
s = s + " World"; // a new String object with the content "Hello World" is created

If a mutable string is needed, classes like StringBuilder or StringBuffer are used.