範例：一維陣列

import java.util.Scanner;

public class Demo {
	public static void main(String[] args) {
		System.out.print("請輸入行數：");
		Scanner scan = new Scanner(System.in);
		int lines = scan.nextInt();
		int[] data = new int[lines + 1];
		int previous = 1;
		for (int i = 1; i <= lines; i++) {
			for (int j = 1; j <= i; j++) {
				int current = data[j];
				data[j] = current + previous;
				previous = current;
				System.out.print(data[j] + " ");
			}
			System.out.println();
		}
		scan.close();
	}
}
 

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範例2：二維陣列

public class Demo {
	public static void main(String[] args) {
		System.out.print("請輸入行數：");
		Scanner scan = new Scanner(System.in);
		int lines = scan.nextInt();
		int[][] data = new int[lines][lines];
		for (int i = 0; i < lines; i++) {
			data[i][0] = 1;
			for (int j = 0; j <= i; j++) {
				if (j == 0) {
					System.out.print(data[i][j] + " ");
					continue;
				}
				data[i][j] = data[i - 1][j] + data[i - 1][j - 1];
				System.out.print(data[i][j] + " ");
			}
			System.out.println();
		}
		scan.close();

	}
}
 

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範例3：等邊三角形

public class Demo06 {

	public static void main(String[] args) {
		System.out.println("請輸入行數：");
		Scanner scan = new Scanner(System.in);
		int lines = scan.nextInt();
		for (int i = 0; i < lines; i++) {
			int number = 1;
			System.out.format("%" + (lines - i) * 2 + "s", "");// 列印空格
			for (int j = 0; j <= i; j++) {
				System.out.format("%4d", number);
				number = number * (i - j) / (j + 1);
			}
			System.out.println();
		}
		scan.close();
	}

}