Java 打印金字塔数字图案程序

编写一个Java程序，使用for循环打印金字塔数字图案。

package Shapes3;

import java.util.Scanner;

public class PyramidNum1 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Pyramid Number Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Pyramid Number Pattern");
		
		for (int i = 1; i <= rows; i++ ) 
		{
			for (int j = rows; j > i; j-- ) 
			{
				System.out.print(" ");
			}
			for(int k = 1; k <= i; k++) 
			{
				System.out.print(i + " ");
			}
			System.out.println();
		}
	}
}

此程序使用while循环打印数字金字塔图案。

package Shapes3;

import java.util.Scanner;

public class PyramidNum2 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Pyramid Number Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Pyramid Number Pattern");
		int j, k, i = 1; 
		
		while(i <= rows ) 
		{
			j = rows;
			while(j > i) 
			{
				System.out.print(" ");
				j--;
			}
			
			k = 1; 
			while(k <= i) 
			{
				System.out.print(i + " ");
				k++;
			}
			
			System.out.println();
			i++;
		}
	}
}

Enter Pyramid Number Pattern Rows = 5
Printing Pyramid Number Pattern
    1 
   2 2 
  3 3 3 
 4 4 4 4 
5 5 5 5 5 

这个示例程序使用do while循环显示数字金字塔图案。

package Shapes3;

import java.util.Scanner;

public class PyramidNum3 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("====");
		int j, k, i = 1; 
		
		do
		{
			j = rows;
			do 
			{
				System.out.print(" ");

			} while(j-- > i);
			
			k = 1; 
			do
			{
				System.out.print(i + " ");

			} while(++k <= i);
			
			System.out.println();

		} while(++i <= rows );
	}
}

Enter Rows = 9
====
         1 
        2 2 
       3 3 3 
      4 4 4 4 
     5 5 5 5 5 
    6 6 6 6 6 6 
   7 7 7 7 7 7 7 
  8 8 8 8 8 8 8 8 
 9 9 9 9 9 9 9 9 9