Java 程序打印镜像数字图案的直角三角形

编写一个 Java 程序，使用 for 循环打印镜像数字图案的直角三角形。

package Shapes3;

import java.util.Scanner;

public class RightTriMirroredColNum1 {

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

此示例使用 while 循环打印镜像数字的直角三角形图案。

package Shapes3;

import java.util.Scanner;

public class RightTriMirroredColNum2 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Right Traingle Mirrored Numbers Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Right Traingle of Mirrored Numbers");
		int i = 1;
		while( i <= rows) 
		{
			int j = 1;
			while( j <= i ) 
			{
				System.out.print(j + " ");
				j++;
			}
			
			int k = i - 1;
			while( k >= 1) 
			{
				System.out.print(k + " ");
				k--;
			}
			System.out.println();
			i++;
		}
	}
}

Enter Right Traingle Mirrored Numbers Rows = 9
Right Traingle of Mirrored Numbers
1 
1 2 1 
1 2 3 2 1 
1 2 3 4 3 2 1 
1 2 3 4 5 4 3 2 1 
1 2 3 4 5 6 5 4 3 2 1 
1 2 3 4 5 6 7 6 5 4 3 2 1 
1 2 3 4 5 6 7 8 7 6 5 4 3 2 1 
1 2 3 4 5 6 7 8 9 8 7 6 5 4 3 2 1 

这个 Java 程序 使用 do while 循环显示数字的直角三角形图案。

package Shapes3;

import java.util.Scanner;

public class RightTriMirroredColNum3 {

	private static Scanner sc;
	
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.print("Enter Right Traingle Mirrored Numbers Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Right Traingle of Mirrored Numbers");
		rtMirroredColumnNumbers(rows);		
	}
	
	public static void rtMirroredColumnNumbers(int rows)
	{
		for (int i = 1; i <= rows; i++ ) 
		{
			for (int j = 1; j <= i; j++ ) 
			{
				System.out.print(j + " ");
			}
			for(int k = i - 1; k >= 1; k--) 
			{
				System.out.print(k + " ");
			}
			System.out.println();
		}
	}
}

Enter Right Traingle Mirrored Numbers Rows = 13
Right Traingle of Mirrored Numbers
1 
1 2 1 
1 2 3 2 1 
1 2 3 4 3 2 1 
1 2 3 4 5 4 3 2 1 
1 2 3 4 5 6 5 4 3 2 1 
1 2 3 4 5 6 7 6 5 4 3 2 1 
1 2 3 4 5 6 7 8 7 6 5 4 3 2 1 
1 2 3 4 5 6 7 8 9 8 7 6 5 4 3 2 1 
1 2 3 4 5 6 7 8 9 10 9 8 7 6 5 4 3 2 1 
1 2 3 4 5 6 7 8 9 10 11 10 9 8 7 6 5 4 3 2 1 
1 2 3 4 5 6 7 8 9 10 11 12 11 10 9 8 7 6 5 4 3 2 1 
1 2 3 4 5 6 7 8 9 10 11 12 13 12 11 10 9 8 7 6 5 4 3 2 1