import java.util.Scanner; public class Patterns { // Main method to test the functionality of the patterns public static void main(String[] args) { // Call method to print design patterns printPatterns(); // Call method to print horizontal bars printHorizontalBars(); // Call method to print vertical bars printVerticalBars(); } // end main // Method to print various patterns using nested loops public static void printPatterns() { System.out.println("printPatterns() method called...."); // First pattern for (int row = 1; row <= 8; row++) { for (int col = 1; col <= 8; col++) { if (row + col <= 9) { System.out.print("# "); } else { System.out.print(" "); } } System.out.println(); // Move to next line after each row } // Second pattern for (int row = 1; row <= 8; row++) { for (int col = 1; col <= 8; col++) { if (row <= 9 - col) { System.out.print("# "); } else { System.out.print(" "); } } System.out.println(); // Move to next line after each row } // Third pattern for (int row = 1; row <= 8; row++) { for (int col = 1; col <= 8; col++) { if (row == 1 || row == 8 || col == 1 || col == 8) { System.out.print("# "); } else if (row == col) { System.out.print("# "); } else { System.out.print(" "); } } System.out.println(); // Move to next line after each row } // Fourth pattern for (int row = 1; row <= 8; row++) { for (int col = 1; col <= 8; col++) { if (row == 1 || row == 8 || col == 1 || col == 8 || row + col == 9) { System.out.print("# "); } else { System.out.print(" "); } } System.out.println(); // Move to next line after each row } } // Method to print horizontal bars based on user input public static void printHorizontalBars() { Scanner sc = new Scanner(System.in); int num1, num2, num3, num4; System.out.println("printHorizontalBars() method called...."); System.out.println("Enter four integers:"); // Read the numbers from the keyboard num1 = sc.nextInt(); num2 = sc.nextInt(); num3 = sc.nextInt(); num4 = sc.nextInt(); // Print the horizontal bars printStars(num1); printStars(num2); printStars(num3); printStars(num4); } // Helper method to print a given number of stars private static void printStars(int count) { for (int i = 0; i < count; i++) { System.out.print("* "); } System.out.println(); // Move to next line after printing stars } // Method to print vertical bars based on user input public static void printVerticalBars() { Scanner sc = new Scanner(System.in); int num1, num2, num3, num4; System.out.println("printVerticalBars() method called...."); System.out.println("Enter four integers:"); // Read the numbers from the keyboard num1 = sc.nextInt(); num2 = sc.nextInt(); num3 = sc.nextInt(); num4 = sc.nextInt(); // Find the maximum number of stars in any column int max = Math.max(num1, Math.max(num2, Math.max(num3, num4))); // Print the vertical bars for (int i = max; i > 0; i--) { if (i <= num1) System.out.print("** "); else System.out.print(" "); if (i <= num2) System.out.print("** "); else System.out.print(" "); if (i <= num3) System.out.print("** "); else System.out.print(" "); if (i <= num4) System.out.print("** "); else System.out.print(" "); System.out.println(); // Move to the next line after each level } // Print the row of dashes System.out.println("------------------------------"); } }
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