Java Tutorial String Methods in Java

What Is a Java String?

String to int in Java - GeeksforGeeks

Assertion: In Java, the String class is used to create and manipulate strings, and it is immutable. Reason: Immutability ensures that once a String object is created, its value cannot be changed. - Computer Science (Theory) | Shaalaa.com

Why String is immutable and StringBuffer is mutable in Java? - TimesMojo

String Concatenation in C - GeeksforGeeks

String Concatenation

Java - Concatenate a string to the end of another string