What is String in Java
In Java, a
String is a class that represents a sequence of characters. It is one of the most commonly used classes in Java and is part of the
java.lang package, which means it is automatically imported into every Java program. Strings in Java are immutable, meaning once a
String object is created, it cannot be changed. If you want to modify a string, you create a new string object.
Creating Strings in Java:
1. Using String Literal:
You can create a string using double quotes. Java automatically converts string literals to String objects.
2. Using the
You can create a string object using the
new keyword, which explicitly creates a new instance of the String class.
String Methods and Operations:
Strings in Java come with a variety of built-in methods for manipulating and analyzing the content. Here are some common operations and methods related to strings:
Strings can be concatenated using the
You can find the length of a string using the
You can extract a substring from a string using the
Strings should be compared using the
equals() method, not
5. Immutable Nature:
Strings are immutable; their values cannot be changed after creation. When you modify a string, a new object is created.
In summary, a
String in Java is a sequence of characters, and it is an important and versatile data type that finds widespread use in Java applications, from simple text manipulation to complex operations involving regular expressions and internationalization.