Java 打印 K 形数字图案程序

编写一个使用 for 循环的 Java 程序来打印 K 形数字图案，并附带示例。

import java.util.Scanner;

public class KshapeNumber1 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		int i, j;
		
		System.out.print("Enter K Shape Number Pattern Rows = ");
		int rows = sc.nextInt();
		
		System.out.println("Printing K Shape Numbers Pattern");		
		
		for (i = rows; i >= 1; i-- ) 
		{
			for (j = 1 ; j <= i; j++ ) 	
			{
				System.out.print(j+ " ");
			}
			System.out.println();
		}
		
		for (i = 2 ; i <= rows; i++ ) 
		{
			for (j = 1 ; j <= i; j++ ) 	
			{
				System.out.print(j+ " ");
			}
			System.out.println();
		}
	}
}

此 Java 程序使用 while 循环显示数字的 K 形图案。

import java.util.Scanner;

public class KshapeNumber2 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Rows = ");
		int rows = sc.nextInt();
			
		int i = rows, j;
		
		while (i >= 1 ) 
		{
			j = 1 ; 
			while (j <= i ) 	
			{
				System.out.print(j+ " ");
				j++;
			}
			System.out.println();
			i--;
		}
		
		i = 2 ;
		while( i <= rows ) 
		{
			j = 1 ; 
			while (j <= i ) 	
			{
				System.out.print(j+ " ");
				j++;
			}
			System.out.println();
			i++;
		}
	}
}

Enter Rows = 9

1 2 3 4 5 6 7 8 9 
1 2 3 4 5 6 7 8 
1 2 3 4 5 6 7 
1 2 3 4 5 6 
1 2 3 4 5 
1 2 3 4 
1 2 3 
1 2 
1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5 
1 2 3 4 5 6 
1 2 3 4 5 6 7 
1 2 3 4 5 6 7 8 
1 2 3 4 5 6 7 8 9 

使用 do while 循环的 Java 打印 K 形数字图案程序。

import java.util.Scanner;

public class KshapeNumber3 {
	
	private static Scanner sc;
	
	public static void main(String[] args) {
		
		sc = new Scanner(System.in);	
		
		System.out.print("Enter Rows = ");
		int rows = sc.nextInt();
			
		int i = rows, j;
		
		do 
		{
			j = 1 ; 
			do	
			{
				System.out.print(j+ " ");

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

		} while (--i >= 1 );
		
		i = 2 ;
		do
		{
			j = 1 ; 
			do	
			{
				System.out.print(j+ " ");

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

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

Enter Rows = 12

1 2 3 4 5 6 7 8 9 10 11 12 
1 2 3 4 5 6 7 8 9 10 11 
1 2 3 4 5 6 7 8 9 10 
1 2 3 4 5 6 7 8 9 
1 2 3 4 5 6 7 8 
1 2 3 4 5 6 7 
1 2 3 4 5 6 
1 2 3 4 5 
1 2 3 4 
1 2 3 
1 2 
1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5 
1 2 3 4 5 6 
1 2 3 4 5 6 7 
1 2 3 4 5 6 7 8 
1 2 3 4 5 6 7 8 9 
1 2 3 4 5 6 7 8 9 10 
1 2 3 4 5 6 7 8 9 10 11 
1 2 3 4 5 6 7 8 9 10 11 12