StringBuffer offsetByCodePoints() method in Java with Examples
Last Updated :
04 Dec, 2018
The offsetByCodePoints() method of StringBuffer class returns the index within this String contained by StringBuffer that is offset from the index passed as parameter by codePointOffset code points. Unpaired surrogates lies between index and codePointOffset count as one code point each.
Syntax:
public int offsetByCodePoints(int index,
int codePointOffset)
Parameters: This method takes two parameters:
- index: the index to be offset
- codePointOffset: the offset in code points
Return Value: This method returns the index within this sequence.
Exception: This method throws IndexOutOfBoundsException if any one below is true:
- index < 0 or index > length of the sequence.
- codePointOffset > 0 and the subsequence starting with index has fewer than codePointOffset code points
- codePointOffset < and the subsequence before index has fewer than the absolute value of codePointOffset code points.
Below programs demonstrate the offsetByCodePoints() method of StringBuffer Class:
Example 1:
class GFG {
public static void main(String[] args)
{
StringBuffer
str
= new StringBuffer( "WelcomeGeeks" );
System.out.println( "String = "
+ str.toString());
int returnvalue = str.offsetByCodePoints( 1 , 4 );
System.out.println( "Index = " + returnvalue);
}
}
|
Output:
String = WelcomeGeeks
Index = 5
Example 2:
class GFG {
public static void main(String[] args)
{
StringBuffer
str
= new StringBuffer( "India Is great" );
System.out.println( "String = " + str.toString());
int returnvalue = str.offsetByCodePoints( 2 , 9 );
System.out.println( "Index = " + returnvalue);
}
}
|
Output:
String = India Is great
Index = 11
Example 3: To demonstrate IndexOutOfBoundException
class GFG {
public static void main(String[] args)
{
StringBuffer
str
= new StringBuffer( "India" );
try {
int returnvalue = str.offsetByCodePoints( 2 , 9 );
System.out.println( "Index = " + returnvalue);
}
catch (IndexOutOfBoundsException e) {
System.out.println( "Exception: " + e);
}
}
}
|
Output:
Exception: java.lang.IndexOutOfBoundsException
Reference:
https://docs.oracle.com/javase/10/docs/api/java/lang/StringBuffer.html#offsetByCodePoints(int, int)
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