string select lines that start with regex java code example

Example 1: Regex split java

package com.tutorialspoint;

import java.lang.*;

public class StringDemo {

   public static void main(String[] args) {

      String str = "a d, m, i.n";
      String delimiters = "\\s+|,\\s*|\\.\\s*";

      // analyzing the string 
      String[] tokensVal = str.split(delimiters);

      // prints the number of tokens
      System.out.println("Count of tokens = " + tokensVal.length);
    
      for(String token : tokensVal) {
         System.out.print(token);
      } 
   }
}

Example 2: java startswith regex

public class StringExample 
{
    public static void main(String[] args) 
    {
        String blogName = "howtodoinjava.dfcom";
         
        blogName.startsWith(null);
    }
}