StringBuffer codePointAt() method in Java with Examples

The codePointAt() method of StringBuffer class returns a character Unicode point at that index in sequence contained by StringBuffer. This method returns the “Unicodenumber” of the character at that index. Value of index must be lie between 0 to length-1. If the char value present at the given index lies in the high-surrogate range, the following index is less than the length of this sequence, 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. Syntax:

public int codePointAt(int index)

Parameters: This method takes one parameter index which is int value representing index of the character whose unicode value to be returned. Return Value: This method returns unicode number of the character at the specified index. Exception: This method throws IndexOutOfBoundsException when index is negative or greater than or equal to length(). Below programs demonstrate the codePointAt() method of StringBuffer Class: Example 1: Java

// Java program to demonstrate // the codePointAt() method class GFG {  public static void main(String[] args)  {  // create a StringBuffer object  StringBuffer str = new StringBuffer();  // add the String to StringBuffer Object  str.append("Geeksforgeeks");  // get unicode of char at position 10  int unicode = str.codePointAt(10);  // print the result  System.out.println("Unicode of Character "  + "at Position 10 "  + "in StringBuffer = "  + unicode);  } } 

Example 2: To demonstrate IndexOutOfBoundsException Java

// Java program demonstrate // IndexOutOfBoundsException thrown by // the codePointAt() Method. class GFG {  public static void main(String[] args)  {  // create a StringBuffer object  // with a String pass as parameter  StringBuffer  str  = new StringBuffer("GeeksForGeeks Contribute");  try {  // get char at position 25 which is  // greater then length  int i = str.codePointAt(25);  }  catch (IndexOutOfBoundsException e) {  System.out.println("Exception: " + e);  }  } } 

References: https://docs.oracle.com/javase/10/docs/api/java/lang/StringBuffer.html#codePointAt(int)