java.lang.Character codePointAt(char[] a, int index)

Description

The Character.codePointAt(char[] a, int index) java method returns the code point at the given index of the char array. If the char value at the given index in the char array is in the high-surrogate range, the following index is less than the length of the char array, and the char value at the following index is in the low-surrogate range, then the supplementary code point corresponding to this surrogate pair is returned. Otherwise, the char value at the given index is returned.

Make a note that the codePointAt method of Character class is static thus it should be accessed statically which means the we would be calling this method in this format:

Character.codepointAt(method args)

Non static method is usually called by just declaring method_name(argument) however in this case since the method is static, it should be called by appending the class name as suffix. We will be encountering a compilation problem if we call the java codepointAt() method non statically.

Method Syntax

public static int charCount(int codePoint)

Method Argument

Data Type Parameter Description
char[] a the char array
int index the index to the char values (Unicode code units) in the char array to be converted

Method Returns

The codePointAt(char[] a, int index) method of Character class returns the Unicode code point at the given index.

Compatibility

Requires Java 1.5 and up

Java Character codePointAt(char[] a, int index) Example

Below is a simple java example on the usage of codePointAt(char[] a, int index) method of Character class.

package com.javatutorialhq.java.examples;

import java.util.Scanner;

/*
 * This example source code demonstrates the use of 
 * codePointAt(CharSequence seq, int index)
 * method of Character class.
 */

public class CharacterCodePointAtExample {

	public static void main(String[] args) {

		// initialize a new CharSequence object
		CharSequence cs = "This is a test string";
		
		// Ask for user input
		System.out.print("Enter desired index:");
		
		// use scanner to get the user input
		Scanner s = new Scanner(System.in);
		int index = s.nextInt();
		
		// close the scanner object
		s.close();
		
		// get the code point at the given 
		// index of the CharSequence
		
		int result = Character.codePointAt(cs, index);
		System.out.println("Result:"+result);
	}

}

Sample Output

Below is the sample output when you run the above example.

java Character codePointAt(char[] a, int index) example output

Suggested Reading List

References