Strings in java - CodingAliens

What are Strings in Java?

The Strings in Java are used for storing the text.

A String  isn't a primitive data type in a Java as i told you in my previous tutorial.It is the class in the java.

A String  variables contains a collection(or an array) of characters surrounded by double quotes.

In this tutorial, you will learn-

• What are Strings in Java?
• String Syntax
• String length
• String Concatenation
• Important Java string methods

String Syntax :

<String> <variable_name> = "string  or sequence_of_characters";

NOTE  In java,objects of string are immutable(constant) ,which means string cannot be changed once it's created.

There are two ways to create string in java :

1. String literal

String s = “CodingAliens”;

2. Using new Keyword

String s = new String (“CodingAliens”);

String Length :

A String in Java is an object of string class as i told you, which contains methods that can perform certain operations on strings.The length of a string can be found with the length() method present inside the string class:

String s = “CodingAliens”;

int length = s.length();

String Concatination:

Concatination = joining of 2 or more strings.

The concat() method is used to combine or join the strings.

NOTE  In java, +  operator is used for both adding the values as well as concatinate the strings.

String s1 ="Coding";    String s2 = “Aliens”;

String s3 = s1.concat(s2);   //or s3 = s1 + s2 ;

Important Java String Methods: