Check if a string starts with a specified prefix code example

Example 1: java string contains at beginning

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

Example 2: how to check string start with #

public class JavaExample{  
   public static void main(String args[]){ 
	//given string
	String s = "   This is just a sample string";  
		
	//checking whether the given string starts with "This"
	System.out.println(s.startsWith("This"));  
		
	//checking whether the given string starts with "Hi"
	System.out.println(s.startsWith("Hi"));  
   }
}