Matcher appendTail(StringBuffer) method in Java with Examples
Last Updated :
27 Nov, 2018
The appendTail(StringBuffer) method of Matcher Class behaves as a append-and-replace method. This method reads the input string and appends it to the given StringBuffer at the tail position.
Syntax:
public StringBuffer appendTail(StringBuffer buffer)
Parameters: This method takes a parameter buffer which is the StringBuffer that stores the target string.
Return Value: This method returns a StringBuffer with the target String replaced.
Below examples illustrate the Matcher.appendTail() method:
Example 1:
import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
String regex = "(Geeks)" ;
Pattern pattern = Pattern.compile(regex);
String stringToBeMatched = "GeeksForGeeks Geeks for For Geeks Geek" ;
Matcher matcher = pattern.matcher(stringToBeMatched);
System.out.println( "Before Replacement: " + stringToBeMatched);
String stringToBeReplaced = "GEEKS" ;
StringBuffer buffer = new StringBuffer();
while (matcher.find()) {
matcher.appendReplacement(buffer,
stringToBeReplaced);
}
matcher.appendTail(buffer);
System.out.println( "After Replacement: "
+ buffer.toString());
}
}
|
Output:
Before Replacement: GeeksForGeeks Geeks for For Geeks Geek
After Replacement: GEEKSForGEEKS GEEKS for For GEEKS Geek
Example 2:
import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
String regex = "(FGF)" ;
Pattern pattern
= Pattern.compile(regex);
String stringToBeMatched
= "FGF FGF FGF FGF" ;
Matcher matcher
= pattern.matcher(stringToBeMatched);
System.out.println( "Before Replacement: "
+ stringToBeMatched);
String stringToBeReplaced = "GFG" ;
StringBuffer buffer = new StringBuffer();
while (matcher.find()) {
matcher.appendReplacement(buffer,
stringToBeReplaced);
}
matcher.appendTail(buffer);
System.out.println( "After Replacement: "
+ buffer.toString());
}
}
|
Output:
Before Replacement: FGF FGF FGF FGF
After Replacement: GFG GFG GFG GFG
Reference: https://docs.oracle.com/javase/9/docs/api/java/util/regex/Matcher.html#appendTail-java.lang.StringBuffer-
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