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Regular Expression Metacharacter in Java
The subexpression/metacharacter “\t” matches the tab spaces.
Example 1
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexExample {
public static void main( String args[] ) {
String regex = "\t";
Scanner sc = new Scanner(System.in);
System.out.println("Enter a string: ");
String input = sc.nextLine();
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(input);
int count = 0;
while(m.find()) {
count ++;
}
System.out.println("Number of tab spaces: "+count);
}
}Output
Enter a string: This is a sentence with tab spaces Number of tab spaces: 6
Example 2
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexExample {
public static void main( String args[] ) {
String regex = "\t";
Scanner sc = new Scanner(System.in);
System.out.println("Enter a string: ");
String input = sc.nextLine();
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(input);
int count = 0;
String result = "";
while(m.find()) {
result = m.replaceAll(" ");
}
System.out.println("Result: "+result);
}
}Output
Enter a string: This is a sentence with tab spaces Result: This is a sentence with tab spaces
Updated on: 19-Nov-2019
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