如何输出菱形java.

输出菱形的Java代码示例

以下是使用Java输出菱形的几种常见方法，包括固定大小和自定义大小的菱形。

固定大小的菱形

public class DiamondPattern {
    public static void main(String[] args) {
        int size = 5;
        for (int i = 1; i <= size; i++) {
            for (int j = size; j > i; j--) {
                System.out.print(" ");
            }
            for (int k = 1; k <= (2 * i - 1); k++) {
                System.out.print("*");
            }
            System.out.println();
        }
        for (int i = size - 1; i >= 1; i--) {
            for (int j = size; j > i; j--) {
                System.out.print(" ");
            }
            for (int k = 1; k <= (2 * i - 1); k++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}

自定义大小的菱形

import java.util.Scanner;

public class CustomDiamond {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter the size of the diamond: ");
        int size = scanner.nextInt();

        for (int i = 1; i <= size; i++) {
            for (int j = size; j > i; j--) {
                System.out.print(" ");
            }
            for (int k = 1; k <= (2 * i - 1); k++) {
                System.out.print("*");
            }
            System.out.println();
        }
        for (int i = size - 1; i >= 1; i--) {
            for (int j = size; j > i; j--) {
                System.out.print(" ");
            }
            for (int k = 1; k <= (2 * i - 1); k++) {
                System.out.print("*");
            }
            System.out.println();
        }
        scanner.close();
    }
}

空心菱形

public class HollowDiamond {
    public static void main(String[] args) {
        int size = 5;
        for (int i = 1; i <= size; i++) {
            for (int j = size; j > i; j--) {
                System.out.print(" ");
            }
            for (int k = 1; k <= (2 * i - 1); k++) {
                if (k == 1 || k == (2 * i - 1)) {
                    System.out.print("*");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
        for (int i = size - 1; i >= 1; i--) {
            for (int j = size; j > i; j--) {
                System.out.print(" ");
            }
            for (int k = 1; k <= (2 * i - 1); k++) {
                if (k == 1 || k == (2 * i - 1)) {
                    System.out.print("*");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
    }
}

数字菱形

public class NumberDiamond {
    public static void main(String[] args) {
        int size = 5;
        for (int i = 1; i <= size; i++) {
            for (int j = size; j > i; j--) {
                System.out.print(" ");
            }
            for (int k = 1; k <= i; k++) {
                System.out.print(k + " ");
            }
            System.out.println();
        }
        for (int i = size - 1; i >= 1; i--) {
            for (int j = size; j > i; j--) {
                System.out.print(" ");
            }
            for (int k = 1; k <= i; k++) {
                System.out.print(k + " ");
            }
            System.out.println();
        }
    }
}

这些代码示例展示了如何输出不同风格的菱形图案，可以根据需要选择或修改其中的参数和逻辑。