String Methods in Java length() concat() toUpperCase() toLowerCase() | #java Tutorial for Beginners

In this video tutorial, we covered what is a string, How we define it, Various operations on string using string methods like
length()
concat()
toUpperCase()
toLowerCase()
Strings
Strings, which are widely used in Java programming, are a sequence of characters. In the Java programming language, strings are objects.

The Java platform provides the String class to create and manipulate strings.

Example:

String str = "codingxpert";

What is String in Java?
Generally, String is a sequence of characters. But in Java, string is an object that represents a sequence of characters. The java.lang.String class is used to create a string object.

A Java string is a sequence of characters that exist as an object of the class java.lang. Java strings are created and manipulated through the string class. Once created, a string is immutable -- its value cannot be changed.

methods of class String enable:

Examining individual characters in the string.
Comparing strings.
Searching strings.
Copying strings with characters converted from upper to lower case or vice versa.
Strings can be created simply. For example:

String greeting = "Hello world!";

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