Java Matcher appendTail() Method

This method is used to implement a terminal append-and-replace step. This method reads characters from the input sequence, starting at the replaced append position, and appends them to the given string buffer.

Syntax

Parameter

strbuff - The target string buffer

Returns

The target string buffer

Example 1

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MatcherAppendTailExample1 {

	public static void main(String[] args) {
		
//pattern/expression to be matched
		Pattern p = Pattern.compile("a+");
		//Regular expression
		 Matcher m = p.matcher(" 13aaa08aaa2018 ");
		 // Creating the target string buffer
		 StringBuffer sb = new StringBuffer();
		 while (m.find()) {
		     m.appendReplacement(sb, "-");//calling method
		 }
		 // Appending the string buffer to the end 
		 m.appendTail(sb);
		 //converting String Buffer to String
		 System.out.println(sb.toString());
}
}

Test it Now

Output:

13-08-2018

Example 2

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MatcherAppendTailExample2 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		//pattern/expression to be matched
		Pattern p = Pattern.compile("a+");
		//Regular expression
		 Matcher m = p.matcher(" 13aaa08aaa2018 ");
		 
		 // Creating the target string buffer
		 StringBuffer sb = new StringBuffer();
		 while (m.find()) {
			 m.appendReplacement(sb,"-" );
			 System.out.println(" start : "+m.start()+", End : "+m.end());
		}
		 // Appending the string buffer to the end 
		 m.appendTail(sb);
		 //converting String Buffer to String
		 System.out.println("After Replacing Matching position: "+sb.toString());
	}
}

Test it Now

Output of the above program

 start : 3, End : 6
 start : 8, End : 11
 After Replacing Matching position: 13-08-2018

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