<span style="font-size:18px;">密碼規則：長度不能小於6位，必須包含字母和數字。</span>

public void say() {
		Scanner sc = new Scanner(System.in);
		String password = "";
		int i = 0;

		while (i < 3) {
			System.out.println("請輸入你的密碼：");
			password = sc.nextLine();
			if (password.length() < 6) {
				System.out.println("您的密碼長度小於6");
			} else {
				boolean boo1 = password.matches("\\d*[a-z]+\\d*");// 正則表示式
				boolean boo2 = password.matches("[a-z]*\\d+[a-z]*");
				if (boo1 & boo2) {
					System.out.println("您的密碼設定成功");
					break;
				}
			}
			/*
			 * if (containsLetter(password) && containsNumber(password)) {
			 * System.out.println("你的密碼儲存成功"); break;
			 * 
			 * } }
			 */

			if (i == 2) {
				System.out.println("對不起，三次輸入已完結！");
				return;
			}
			i++;
		}
		System.out.println("你的密碼是：" + password + "");
	}
	/*
	 * private boolean containsNumber(String str) { String number =
	 * "1234567890"; for (int i = 0; i < str.length(); i++) { char c =
	 * str.charAt(i); if (number.contains("" + c)) { return true; } }
	 * 
	 * return false; }
	 * 
	 * private boolean containsLetter(String str) { String letter =
	 * "qwertyuioplkjhgfdsazxcvbnm"; for (int i = 0; i < str.length(); i++) {
	 * char c = str.charAt(i); if (letter.contains("" + c)) { return true; } }
	 * return false; }
	 */
}