Basic String Class

Basic String Class

Definition: String is a collection of characters. In Java String defines the object. The string is normally used to represent the collection of characters

Syntax of String Constructor

Example Program

Let us look at a sample program in which the string object is used in order to handle some text.

Java Program [String Demo.Java]

/*This is a Java program which makes use of strings

*/

class String Demo

{

public static void main(String args[])

{

String s "Hello, How are You?";

System.out.println(s);

}

}

Output

Hello, How are You?

String Literal

In Java String can be represented as a sequence of characters enclosed within the double quotes.

For example

String s= "Hello, How are you?"

We can initialize the string using the empty string literal. For example

String mystr=""

Similarly the escape sequence can be used to denote a particular character in the string literal. For example we can use back slash followed by double quote to print the double quote character.

“\" “་

Alternatively, String can be denoted as the array of characters.For example:

char str[] = {'P', 'R', 'O', 'G', 'R', 'A', 'M'};

Now we can have a variable s which can then be initialized with the string "PROGRAM" as follows -

String s = new String(str);

Operations on String

Following are some commonly defined methods by a string class -