Java核心编程的例题，为什么总报数组下表溢出

[chaoliu1024]

第一个程序

public static void main(String[] args) {
		if (args[0].equals("-h")) // 这里报错
			System.out.print("Hello,");
		else if (args[0].equals("-g"))
			System.out.print("Goodbye");
		for (int i = 1; i < args.length; i++)
			System.out.print(" " + args[i]);
		System.out.print("!");
	}

第二个程序

public static void main(String[] args){
		Scanner in = new Scanner(System.in);

		System.out.print("How many numbers do you need to draw? ");
		int k = in.nextInt();

		System.out.print("What is the highest number you can draw? ");
		int n = in.nextInt();

		int[] numbers = new int[n];
		for (int i = 0; i < numbers.length; i++)
			numbers[i] = i + 1;

		int[] result = new int[k];
		for (int i = 0; i < result.length; i++) {
			int r = (int) (Math.random() * n);

			result[i] = numbers[r];

			numbers[r] = numbers[n - 1]; // 这里报错
			n--;
		}

		Arrays.sort(result);
		System.out
				.println("Bet the following combination. It'll make you rich!");
		for (int r : result)
			System.out.println(r);
	}
}

异常和第一个是一样的，就不截图了。

[原来缘来]

第一题
楼主没有传递参数吧
Eclipse 右击-->run configurations Arguments 在Program arguments里填上几个参数(用空格隔开)
在dos(黑框)下的话 直接 java Message 参数

[TKD03072010]

public static void main(String[] args) {}
String[] args 是用来接收命令行参数的
楼主没有传参
数组里 当然没值
所以会报错

[原来缘来]

第二题好像没错吧
How many numbers do you need to draw?这句问你像生成多少个数
What is the highest number you can draw?问你这些数中的最大数是多少
然后在后面写上数字(整数)即可
How many numbers do you need to draw? 5
What is the highest number you can draw? 7
Bet the following combination. It'll make you rich!
1
2
3
5
7

[小笨熊]

第二个没有错误。。。

[呆到深处自然萌2]

Hello,
**************
How many numbers do you need to draw? 3
What is the highest number you can draw? 3
Bet the following combination. It'll make you rich!
1
2
3