在本文檔中，首先，我們將了解如何使用 Java 程式設計來處理星形圖案程式。星型模式是一種常見的Java模式程序，廣泛用於提升邏輯思考和流程控制知識。在 Java 程式設計中，您需要使用兩個循環或三個循環（取決於程式）來顯示星形圖案。第一個循環是外循環，第二個循環是內循環，分別顯示行和列。
本文檔對於那些想了解設計模式以提高物件導向設計和開發能力的Java程式設計師有幫助。
廣告 該類別中的熱門課程 JAVA 掌握 - 專業化 | 78 課程系列 | 15 次模擬測驗讓我們討論一些例子來輕鬆理解 Java 中模式的概念。
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：
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：
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：
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：
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：
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：
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：
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：
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：
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：
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：
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：
到目前為止，我們已經討論了 Java 程式語言中不同類型的模式。這些模式是經驗豐富的物件導向軟體設計人員使用的最佳實踐。使用者可以利用這些設計模式來討論物件導向的軟體設計。借助這些模式，沒有經驗的開發人員可以越來越快地學習軟體設計。
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