content: import java.util.stream.Stream;
  //import org.apache.commons.lang3.StringUtils;
  
  public class User Interface {
  	public static void main(String args[]) {
  		String str1="      Hello \n       Welcome to\n      New String Methods in Java   ";
  		String str2="Programming";
  		int n=5;
  		boolean res-validateSubmission (str1);
  		if (res==true)
  			System.out.println("The String is empty");
  		else
  			System.out.println("The String is not empty");
  		Stream<String> res1-extractLines (str1);
  		System.out.println("The extracted lines from the String are");
  		res1.forEach(s->System.out.println(s.trim()));
  		String res2=removeWhiteSpaces (str1);
  		System.out.println("The String after removing the leading and trailing whitespaces is");
  		System.out.println(res2);
  		String res3=checkSubmission (str2, n);
  		System.out.println("The String repeated after removing the vowels is");
  		System.out.println(res3);
  	}
  	// Use isBlank () method here
  	public static boolean validateSubmission (String str)
  	{
  		// Fill the ClassLoader
  		boolean bool = str.isBlank ();
  		if (bool) {
  			return true;
  		}
  		else{
  			return false;
  		}
  	}
  	
  	// Use lines () method here
  	public static Stream<String> extractLines (String str)
  	{
  		// Fill the code
  		Stream<String> lines = str.lines();
  		//lines.forEach(System.out::println);
  		return (lines);
  	}
  	
  	// Use strip() method here
  	public static String removeWhiteSpaces (String str)
  	{
  		// Fill the code
  		return (str.strip());
  		//return null;
  	}
  
  	// Use repeat () method here
  	public static String checkSubmission (String str,int n)
  	{
  		// Fill the code
  		String str2-str.replaceAll("[aeiouAEIOU]","");
  		return (str2.repeat (n));
  		//return null;
  	}
  }
  