USER-DEFINED METHODS - Java Programming: From Problem Analysis to Program Design - page 410

The complete program is as follows:
// Program: Print a triangle of stars
// Given the number of lines, this program prints a triangle of
// stars.

import java.util.*;

public class TriangleOfStars
{

static Scanner console = new Scanner(System.in);

public static void main(String[] args)
{

int numberOfLines;
int numberOfBlanks;
int counter = 1;

System.out.print("Enter the number of star lines "
+ "(1 to 20) to be printed: ");
numberOfLines = console.nextInt();
System.out.println();

while (numberOfLines < 0 || numberOfLines > 20)
{

System.out.println("The number of star lines should "
+ "be between 1 and 20");
System.out.print("Enter the number of star lines "
+ "(1 to 20) to be printed: ");
numberOfLines = console.nextInt();
System.out.println ();

}

numberOfBlanks = 30;

for (counter = 1; counter <= numberOfLines; counter++)
{

printStars(numberOfBlanks, counter);
numberOfBlanks--;

}
} // end main

public static void printStars( int blanks, int starsInLine)
{

int count = 1;

for (count = 1; count <= blanks; count++)
System.out.print(" ");

for (count = 1; count <= starsInLine; count++)
System.out.print(" *");

System.out.println();
} //end printStars

}