Java 打印右箭头数字图案程序

编写一个Java程序，使用for循环打印右箭头数字图案。

import java.util.Scanner;

public class RightArrowNumber1 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		int i, j;
		
		System.out.print("Enter Right Arrow Number Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Right Arrow Numbers Pattern");
		
		for (i = 1 ; i <= rows; i++ ) 
		{
			for (j = 1 ; j <= rows; j++ ) 
			{
				if(j < i) {
					System.out.print(" ");
				}
				else {
					System.out.print(j);
				}
			}
			System.out.println();
		}
		
		for (i = 1 ; i < rows; i++ ) 
		{
			for (j = 1 ; j <= rows; j++ ) 
			{
				if(j < rows - i) {
					System.out.print(" ");
				}
				else {
					System.out.print(j);
				}
			}
			System.out.println();
		}
	}
}

这是使用while循环显示右箭头数字图案的另一种Java程序写法Java程序。

import java.util.Scanner;

public class RightArrowNumber2 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		int i, j, k;
		
		System.out.print("Enter Right Arrow Number Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing Right Arrow Numbers Pattern");
		
		for (i = 1 ; i <= rows; i++ ) 
		{
			for (j = 1 ; j < i; j++ ) 
			{
				System.out.print(" ");
			}
			for (k = i ; k <= rows; k++ ) 
			{
				System.out.print(k);
			}
			System.out.println();
		}
		
		for (i = rows - 1 ; i >= 1; i-- ) 
		{
			for (j = 1 ; j < i; j++ ) 
			{
				System.out.print(" ");
			}
			for (k = i ; k <= rows; k++ ) 
			{
				System.out.print(k);
			}
			System.out.println();
		}
	}
}

Enter Right Arrow Number Pattern Rows = 9
Printing Right Arrow Numbers Pattern
123456789
 23456789
  3456789
   456789
    56789
     6789
      789
       89
        9
       89
      789
     6789
    56789
   456789
  3456789
 23456789
123456789