java输出杨辉三角居中

要在Java中输出杨辉三角居中，可以使用循环和二维数组来实现。以下是一个示例代码：

import java.util.Scanner;

public class YangHuiTriangle {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入要打印的行数：");
        int rows = scanner.nextInt();
        
        int[][] triangle = new int[rows][];
        
        for (int i = 0; i < rows; i++) {
            triangle[i] = new int[i + 1];
            triangle[i][0] = 1;
            triangle[i][i] = 1;
            
            for (int j = 1; j < i; j++) {
                triangle[i][j] = triangle[i - 1][j - 1] + triangle[i - 1][j];
            }
        }
        
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < rows - i - 1; j++) {
                System.out.print(" ");
            }
            
            for (int j = 0; j <= i; j++) {
                System.out.print(triangle[i][j] + " ");
            }
            
            System.out.println();
        }
    }
}

运行以上代码，输入要打印的行数，即可输出杨辉三角形，居中显示。