public class TriangleUtilities {

    public static String getRow(int numberOfStars) {
    int counter = 1;
    String triangle = "";
    String add = "*";

    for (int i = 1; i <= numberOfStars; i++){
     triangle = triangle + add;
    }
    return triangle;
    }
    
    public static String getTriangle(int numberOfRows) {
    int counter = 1;
    String triangle = "";
    String add = "*";

    for (int i = 1; i <= numberOfRows; i++){

     for (int y = 1; y <= counter; y++){
     triangle = triangle + add;
      }
      counter++;
     triangle = triangle + System.getProperty("line.separator");
    }
    return triangle;
    }


    public static String getSmallTriangle() {
    int width = 4;
    int counter = 1;
    String triangle = "";
    String add = "*";

    for (int i = 1; i <= width; i++){

     for (int y = 1; y <= counter; y++){
     triangle = triangle + add;
      }
      counter++;
     triangle = triangle + System.getProperty("line.separator");
    }
    return triangle;
    }

    public static String getLargeTriangle() {
    int width = 9;
    int counter = 1;
    String triangle = "";
    String add = "*";

    for (int i = 1; i <= width; i++){

     for (int y = 1; y <= counter; y++){
     triangle = triangle + add;
      }
      counter++;
     triangle = triangle + System.getProperty("line.separator");
    }
    return triangle;
    }
}