Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Matcher quoteReplacement(String s) method in Java with Examples
The appendReplacement() method of the Matcher class accepts a StringBuffer object and a String (replacement string) as parameters and, appends the input data to the StringBuffer object, replacing the matched content with the replacement string.
Internally, this method reads each character from the input string and appends the String buffer, whenever a match occurs it appends the replacement string instead of matched content part of the string to the buffer and, proceeds from the next position of the matched substring.
While passing the replacement string to this method if you use “/” or “$” they will not be considered as regular characters and an exception occurs −
Example 1
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class QuoteReplacement {
public static void main(String[] args) {
String str = " <p>This <b>is</b> an <b>example</b> HTML <b>script</b>.</p>";
//Regular expression to match contents of the bold tags
String regex = "<b>(\S+)</b>";
System.out.println("Input string: \n"+str);
//Creating a pattern object
Pattern pattern = Pattern.compile(regex);
//Matching the compiled pattern in the String
Matcher matcher = pattern.matcher(str);
//Creating an empty string buffer
StringBuffer sb = new StringBuffer();
while (matcher.find()) {
matcher.appendReplacement(sb, "sampledata$" );
//Matcher.quoteReplacement("Bo$ld/Data$"));
}
matcher.appendTail(sb);
System.out.println("Contents of the StringBuffer: \n"+ sb.toString() );
}
}Output
Input string:<p>This <b>is</b> an <b>example</b> HTML <b>script</b>.</p>
Exception in thread "main" java.lang.IllegalArgumentException: Illegal group reference: group index is missing at java.util.regex.Matcher.appendReplacement(Unknown Source) at OCTOBER.matcher.QuoteReplacement.main(QuoteReplacement.java:18)
The quote Replacement method of the Matcher class accepts a string value and returns a literal replacement string. i.e. The characters / and $ are ignored in the given string and the results can be used as a parameter to the appendReplacement() method.
Example 2
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class QuoteReplacement {
public static void main(String[] args) {
String str = "<p>This <b>is</b> an <b>example</b> HTML <b>script</b>.</p>";
//Regular expression to match contents of the bold tags
String regex = "<b>(\S+)</b>";
System.out.println("Input string: \n"+str);
//Creating a pattern object
Pattern pattern = Pattern.compile(regex);
//Matching the compiled pattern in the String
Matcher matcher = pattern.matcher(str);
//Creating an empty string buffer
StringBuffer sb = new StringBuffer();
while (matcher.find()) {
matcher.appendReplacement(sb, Matcher.quoteReplacement("Bo$ld/Data$"));
}
matcher.appendTail(sb);
System.out.println("Contents of the StringBuffer: \n"+ sb.toString() );
}
}Output
Input string: <p>This <b>is</b> an <b>example</b> HTML <b>script</b>.</p> Contents of the StringBuffer: <p>This Bo$ld/Data$ an Bo$ld/Data$ HTML Bo$ld/Data$.</p>
Example 3
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class QuoteReplacementExample {
public static void main(String[] args) {
String input = "This is sample text";
String regex = "[#]";
//Creating a pattern object
Pattern pattern = Pattern.compile(regex);
//Matching the compiled pattern in the String
Matcher matcher = pattern.matcher(input);
//Creating an empty string buffer
String str = Matcher.quoteReplacement("sampledata");
System.out.println(str);
}
}Output
sampledata
261 Views
