用java實作費波那契數列的前n項和

import java.util.Scanner;

/**
 * FaibonacciNumber.java
 * @author anyunpei 2018年7月22日下午3:54:11
 * 计算faibonacci数列之和
 */
public class FaibonacciNumber {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		int[] a = new int[n];
		a[0] = 0;
		a[1] = 1;
		System.out.println(a[0] + "\n" + a[1]);
		for (int i = 2; i < n; i++) {
			a[i] = a[i - 1] + a[i - 2];
			if (a[i] < 0) {
				System.out.println("请缩小此数列的项数，数列之和已溢出" + "最好保证在（" + i + "）项之内");
				return;
			}
			System.out.println(a[i]);
		}
	}
}