Java 中的万字符图案

17 Mar 2025 | 阅读 2 分钟

在本节中，我们将学习如何在 Java 中使用星号或任何其他特殊字符以及用户定义的行和列来编写 **万字符图案** 的代码。它是 Java 中最难编写的图案程序之一。为了获得完美的万字符，我们必须确保用户输入奇数行和列，因为这样更容易找到行和列的中间值。

我们将使用 **'for'** 循环以如下方式打印 **万字符**

SwastikaPatternExample.java

// import required classes
import java.util.Scanner;
// create class SwastikaPatternExample for printing Swastika
class SwastikaPatternExample
{
	// main() method start
	public static void main (String[] args)
	{
		int rows, cols;
		Scanner sc = new Scanner(System.in);
		System.out.println("Please enter odd numbers for rows and colums to get perfect Swastika.");
		System.out.println("Enter total rows");
		rows = sc.nextInt();
		System.out.println("Enter total colums");
		cols = sc.nextInt();
		
		// close Scanner class
		sc.close();
		
		// call designSwastika() method that will design Swastika for the specified rows and cols
		designSwastika(rows, cols);
	}
	// create designSwastika() method to print Swastika
	static void designSwastika(int rows, int cols)
	{
		for (int u = 0; u < rows; u++) {
			for (int v = 0; v < cols; v++)
			{
				// check whether u is less than from half of rows or not
				if (u < rows / 2)
				{
					// check whether v is less than from half of cols or not
					if (v < cols / 2)
					{
						// print '*' if v == 0
						if (v == 0) 
						{
							System.out.print("*");
						}
						// else we print space
						else 
						{
							System.out.print(" "+ " ");
						}
					}
					// check whether v is equal to half of cols or not
					else if (v == cols / 2) 
					{
						System.out.print(" *");
					}
					else
					{
						// u = 0 denotes 1st row that will have '*'
						if (u == 0)
							System.out.print(" *");
					}
				}
				// check whether u is equal to half of rows or not
				else if (u == rows / 2) {
					System.out.print("* ");
				}
				else
				{
					// When u > rows/2, the middle and last column will have '*'
					if (v == cols / 2 || v == cols - 1)
					{
						System.out.print("* ");
					}
					else if (u == rows - 1)
					{
						// if v <= cols/2 OR if it is last column, the last row will be have '*'
						if (v <= cols / 2 || v == cols - 1) 
						{
							System.out.print("* ");
						}
						else {
							System.out.print(" "+ " ");
						}
					}
					else
					System.out.print(" "+" ");
				}
			}
			System.out.print("\n");
		}
	}
}

输出