打印钻石之星图案的Java程序

编写一个Java程序，使用for循环打印钻石星形图案。钻石图案是一个金字塔和一个倒金字塔的组合。因此，这个Java星形钻石的例子划分了代码来打印正常和倒置的金字塔。

package ShapePrograms;

import java.util.Scanner;

public class DiamondPattern1 { private static Scanner sc;

public static void main(String\[\] args) {
	sc = new Scanner(System.in);
	
	int i, j;
	
	System.out.print("Enter Diamond Pattern Rows = ");
	int rows = sc.nextInt();
	
	System.out.println("Printing Diamond Star Pattern");
	
	for (i = 1 ; i <= rows; i++ ) 
	{
		for (j = 1 ; j <= rows - i; j++ ) 
		{
			System.out.print(" ");	
		}
		for (j = 1 ; j <= i \* 2 - 1; j++ ) 
		{
			System.out.print("\*");
		}
		System.out.println();
	}
	
	for (i = rows - 1 ; i > 0; i-- ) 
	{
		for (j = 1 ; j <= rows - i; j++ ) 
		{
			System.out.print(" ");
		}
		for (j = 1 ; j <= i \* 2 - 1; j++ ) 
		{
			System.out.print("\*");
		}
		System.out.println();
	}
}

在这个Java钻石图案的星星程序中，我们用一个while循环代替了for循环

// 使用while循环打印钻石星形图案的Java程序 包 ShapePrograms;

import java.util.Scanner;

public class DiamondPattern3 { private static Scanner sc;


public static void main(String\[\] args) {
	sc = new Scanner(System.in);
	
	int i, j, k;
	
	System.out.print("Enter Diamond Pattern Rows = ");
	int rows = sc.nextInt();
	
	System.out.println("Printing Diamond Star Pattern");
	i = 1 ;
	while(i <= rows ) 
	{
		j = 1 ;
		while( j <= rows - i  ) 
		{
			System.out.print(" ");	
			j++;
		}
		k = 1 ;
		while ( k <= i \* 2 - 1 ) 
		{
			System.out.print("\*");
			k++;
		}
		System.out.println();
		i++;
	}
	i = rows - 1 ;
	while( i > 0 ) 
	{
		j = 1 ;
		while ( j <= rows - i ) 
		{
			System.out.print(" ");
			j++;
		}
		k = 1 ;
		while( k <= i \* 2 - 1 ) 
		{
			System.out.print("\*");
			k++;
		}
		System.out.println();
		i--;
	}
}

Enter Diamond Pattern Rows = 12
Printing Diamond Star Pattern
           *
          ***
         *****
        *******
       *********
      ***********
     *************
    ***************
   *****************
  *******************
 *********************
***********************
 *********************
  *******************
   *****************
    ***************
     *************
      ***********
       *********
        *******
         *****
          ***
           *

使用do while循环打印钻石之星图案的Java程序

package ShapePrograms;

import java.util.Scanner;

public class DiamondPattern4 { private static Scanner sc;

public static void main(String\[\] args) {
	sc = new Scanner(System.in);
	
	int i, j, k;
	
	System.out.print("Enter Diamond Pattern Rows = ");
	int rows = sc.nextInt();
	
	System.out.println("Printing Diamond Star Pattern");
	i = 1 ;
	do
	{
		j = 1 ;
		do
		{
			System.out.print(" ");	
		} while( j++ <= rows - i  ) ;
		k = 1 ;
		do
		{
			System.out.print("\*");
		} while ( ++k <= i \* 2 - 1 ) ;
		System.out.println();

	} while(++i <= rows ) ;
	
	i = rows - 1 ;
	do
	{
		j = 1 ;
		do
		{
			System.out.print(" ");
		} while (j++ <= rows - i ) ;
		k = 1 ;
		do
		{
			System.out.print("\*");
		} while( ++k <= i \* 2 - 1 ) ;
		System.out.println();
	} while( --i > 0 ) ;
}

Enter Diamond Pattern Rows = 15
Printing Diamond Star Pattern
               *
              ***
             *****
            *******
           *********
          ***********
         *************
        ***************
       *****************
      *******************
     *********************
    ***********************
   *************************
  ***************************
 *****************************
  ***************************
   *************************
    ***********************
     *********************
      *******************
       *****************
        ***************
         *************
          ***********
           *********
            *******
             *****
              ***
               *

在这个Java例子中，diamondPattern函数打印了一个给定符号的钻石图案。

package ShapePrograms;

import java.util.Scanner;

public class DiamondPattern2 { private static Scanner sc;

public static void main(String\[\] args) {
	sc = new Scanner(System.in);
	
	System.out.print("Enter Diamond Pattern Rows = ");
	int rows = sc.nextInt();
	
	System.out.print("Enter Character for Diamond Pattern = ");
	char ch = sc.next().charAt(0);
	
	System.out.println("Printing Diamond Pattern");
	diamondPattern(rows, ch);
}
public static void diamondPattern(int rows, char ch) {
	int i, j, k;
	int x = rows - 1;
	int y = 1;
	
	for (i = 1 ; i <= rows; i++ ) 
	{
		for (j = 1 ; j <= x; j++ ) 
		{
			System.out.print(" ");	
		}
		for (k = 1 ; k <= y; k++ ) 
		{
			System.out.print(ch);
		}
		if(x > i)
		{
			x = x - 1;
			y = y + 2;
		}
		if(x < i)
		{
			x = x + 1;
			y = y - 2;
		}
		System.out.println();
	}
}

Enter Diamond Pattern Rows = 10
Enter Character for Diamond Pattern = #
Printing Diamond Pattern
         #
        ###
       #####
      #######
     #########
     #########
      #######
       #####
        ###
         #