在本文檔中，首先，我們將了解如何使用 Java 編程來處理星形圖案程序。星型模式是一種常見的Java模式程序，廣泛用于提高邏輯思維和流程控制知識。在 Java 編程中，您需要使用兩個循環(huán)或三個循環(huán)（取決于程序）來顯示星形圖案。第一個循環(huán)是外循環(huán)，第二個循環(huán)是內(nèi)循環(huán)，分別顯示行和列。

本文檔對于那些想了解設(shè)計模式以提高面向?qū)ο笤O(shè)計和開發(fā)能力的Java程序員有幫助。

星形圖案示例

讓我們討論一些例子來輕松理解 Java 中模式的概念。

示例#1

代碼：

import java.util.Scanner;
public class FirstPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m = 1; m <= myrows; m++)
{
for (int n = 1; n <= m; n++)
{
System.out.print("*");
}
System.out.println();
}
}
}

輸出：

示例#2

代碼：

import java.util.Scanner;
public class SecondPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m = 1; m <= myrows; m++)
{
for (int n = myrows; n > m; n--)
{
System.out.print("*");
}
System.out.println();
}
}
}

輸出：

示例#3

代碼：

import java.util.Scanner;
public class ThirdPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m = 1; m <= myrows; m++)
{
for (int n = 1; n < m; n++)
{
System.out.print(" ");
}
for (int p=myrows; p>=m; p--)
{
System.out.print("*");
}
System.out.println();
}
}
}

輸出：

示例#4

代碼：

import java.util.Scanner;
public class FourthPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m = 1; m <= myrows; m++)
{
for (int n=myrows; n>m; n--)
{
System.out.print(" ");
}
for (int p=1; p<=(m * 2) -1; p++)
{
System.out.print("*");
}
System.out.println();
}
}
}

輸出：

示例#5

代碼：

import java.util.Scanner;
public class FifthPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m=myrows; m>=1; m--)
{
for (int n=1; n<=(m * 2) -1; n++)
{
System.out.print("*");
}
System.out.println();
for (int p=myrows; p>=m; p--)
{
System.out.print(" ");
}
}
}
}

輸出：

示例#6

代碼：

import java.util.Scanner;
public class SixthPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m=1; m<=myrows; m++)
{
for (int n=myrows; n>m; n--)
{
System.out.print(" ");
}
for (int p=1; p<=(m * 2) -1; p++)
{
System.out.print("*");
}
System.out.println();
}
for (int m=myrows-1; m>=1; m--)
{
for (int n=myrows-1; n>=m; n--)
{
System.out.print(" ");
}
for (int p=1; p<=(m * 2) -1; p++)
{
System.out.print("*");
}
System.out.println();
}
}
}

輸出：

示例#7

代碼：

import java.util.Scanner;
public class SeventhPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m = 1; m <= myrows; m++)
{
for (int n=1; n<=m; n++)
{
if( n == 1 || n == m || m == myrows)
System.out.print("*");
else
System.out.print(" ");
}
System.out.println();
}
}
}

輸出：

示例#8

代碼：

import java.util.Scanner;
public class EighthPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m = myrows; m >= 1; m--)
{
for (int n = m; n >= 1; n--)
{
System.out.print("*");
}
System.out.println();
}
for (int m = 2; m <= myrows; m++)
{
for (int n = m; n >= 1; n--)
{
System.out.print("*");
}
System.out.println();
}
}
}

輸出：

示例 #9

代碼：

import java.util.Scanner;
public class NinthPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m = 1; m <= myrows; m++)
{
for (int n = myrows-1; n>=m; n--)
{
System.out.print(" ");
}
for (int p = 1; p <= myrows; p++)
{
System.out.print("*");
}
System.out.println();
}
}
}

輸出：

示例#10

代碼：

import java.util.Scanner;
public class TenthPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m = 1; m <= myrows; m++)
{
for (int n = 1; n < m; n++)
{
System.out.print(" ");
}
for (int p = m; p <= myrows; p++)
{
System.out.print("* ");
}
System.out.println();
}
for (int m = myrows-1; m >= 1; m--)
{
for (int n = 1; n < m; n++)
{
System.out.print(" ");
}
for (int p = m; p <= myrows; p++)
{
System.out.print("* ");
}
System.out.println();
}
}
}

輸出：

示例#11

代碼：

import java.util.Scanner;
public class ElevenPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m=myrows; m>=1; m--)
{
for (int n=1; n <=(m * 2) -1; n++)
{
if( n == 1 || n == (m * 2) -1 || m == myrows)
System.out.print("*");
else
System.out.print(" ");
}
System.out.println();
for (int p = myrows; p >= m; p--)
{
System.out.print(" ");
}
}
}
}

輸出：

示例#12

代碼：

import java.util.Scanner;
public class TwelthPattern
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide number of rows to print... ");
int myrows = scanner.nextInt();
System.out.println("\nThe star pattern is... ");
for (int m = 1; m <= myrows; m++)
{
for (int n = 1; n <= myrows; n++)
{
System.out.print("*");
}
System.out.println();
}
}
}

輸出：

結(jié)論

到目前為止，我們已經(jīng)討論了 Java 編程語言中不同類型的模式。這些模式是經(jīng)驗豐富的面向?qū)ο筌浖O(shè)計人員使用的最佳實踐。用戶可以利用這些設(shè)計模式來討論面向?qū)ο蟮能浖O(shè)計。借助這些模式，沒有經(jīng)驗的開發(fā)人員可以越來越快地學(xué)習(xí)軟件設(shè)計。

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