StringBuffer codePointAt() method in Java with Examples
Last Updated :
04 Dec, 2018
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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:
Java
Java
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 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);
}
}
// Java program to demonstrate// the codePointAt() methodclass 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); }}
Output:
Example 2: To demonstrate IndexOutOfBoundsException
Unicode of Character at Position 10 in StringBuffer = 101
// 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);
}
}
}
// 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); } }}
Output:
References:
https://docs.oracle.com/javase/10/docs/api/java/lang/StringBuffer.html#codePointAt(int)
Exception: java.lang.StringIndexOutOfBoundsException: String index out of range: 25
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