charAt() - String Method in Java

This article is a part of String Methods in Java.
charAt() returns the character at the specified index in a String. The parameter is of int type, representing the index of the character to return.

Return type

The return type for the charAt() method is char. Let us look at an example code to understand it better.

Example

public class string_methods { public static void main(String[] args) { String str = "LearningJournal"; char ch1 = str.charAt(0); //returns the 1st character of the string char ch2 = str.charAt(9); //returns the 10th character of the string System.out.println("First Character of the String: " + ch1); System.out.println("Tenth Character of the String: " + ch2); } }

Output

Let us look at the output of the above example code.

String Methods charAt() — Fig.1- String Methods : charAt()

IndexOutOfBound exception in charAt()

When we pass negative index or an index greater than length()-1 then the charAt() method throws IndexOutOfBound exception. Let us look at the code for this case.

public class string_methods { public static void main(String[] args) { String str = "LearningJournal"; char ch1 = str.charAt(-1); System.out.println(ch1); } }

Output

Let us look at the output of the above example code.

String Methods charAt() IndexOutOfBound — Fig.2- String Methods : charAt() IndexOutOfBound

Since, the index is a negative number the method throws an exception.

charAt() - String Method in Java

Return type

Example

Output

IndexOutOfBound exception in charAt()

Output

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Author : Satyam Kumar -

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