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Java | String.charAt(index) | Getting character by Index from string

Java String.charAt(index) method with Example: Here, we will learn how to get character by index from a given string?
Submitted by IncludeHelp, on July 03, 2018

String.charAt() function is a library function of String class, it is used to get/retrieve the specific character from a string. Where, the index starts from 0 and ends to String.lenght-1.

For example, if there is string "Hello", its index will starts from 0 and end to 4.

Note: If you try to access the character out of bounds, an exception StringIndexOutOfBoundsException will generate. So, be careful while using index in the string.

Example1:

In this example, there is string initialized by "Hello world!" and we have to access its 0^th and 7^th character.

public class Example1
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String msg = "Hello world!";

		System.out.println("Character at 0th index: "+ msg.charAt(0));
		System.out.println("Character at 7th index: " + msg.charAt(7));
	}
}

Output

    Character at 0th index: H
    Character at 7th index: o

Example2:

In this example, we have to read a string and print it character by character

import java.util.*;

public class Example2
{
	public static void main (String[] args) throws java.lang.Exception
	{
		//string Object
		String msg = null;
		
		//Scanner class Object
		Scanner scan = new Scanner(System.in);
		
		//input a string
		System.out.println("Input a string: ");
		msg = scan.nextLine();
		
		//printing string character by character
		System.out.println("Input string is: ");
		for(int loop =0; loop<msg.length(); loop++)
			System.out.print(msg.charAt(loop));
	}
}

Output

    Input a string:  I love programming.
    Input string is: 
    I love programming.