Java String charAt() Method

String charAt() method in Java returns the character at the specified index in a string. The Index of the first character in a string is 0, the second character is 1, and so on. The index value should lie between 0 and length() - 1.

If the index value is greater than or equal to the string length or negative number it returns stringIndexOutOfBoundsException

Example 1:

Syntax of charAt() Method

public char charAt(int index)

• Parameter: index - Index of the character to be returned.
• Returns: Returns the character at the specified position.
• Exceptions : StringIndexOutOfBoundsException - If the index is negative or greater than the length of the String.

Example 2: The following program demonstrating the Exception case as StringIndexOutOfBoundsException.

Example 3: Accessing the First and Last Character

Example 4: Print Characters Presented at Odd Positions and Even Positions

Example 5: Counting Frequency of a Character in a String