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  1. class Ideone
  2. {
  3. 	private static boolean isDigits(String t, int length) {
  4. 		int l = t.length();
  5. 		if (l != length) return false;
  6. 		for (int i = 0; i < l; i++) {
  7. 			char tmp = t.charAt(i);
  8. 			if (tmp < '0' || tmp > '9') return false;
  9. 		}
  10. 		return true;
  11. 	}
  12.  
  13. 	private static boolean validDate(String date) {
  14.  
  15. 		int[] days = {31,28,31,30,31,30,31,31,30,31,30,31};
  16.  
  17. 		String[] parts = date.split("-");
  18. 		if (parts.length != 3) return false;
  19.  
  20. 		if (!isDigits(parts[0], 2)) return false;
  21. 		int day = Integer.parseInt(parts[0]);
  22. 		if (day < 1 || day > 31) return false;
  23.  
  24. 		if (!isDigits(parts[1], 2)) return false;
  25. 		int month = Integer.parseInt(parts[1]);
  26. 		if (month < 1 || month > 12) return false;
  27.  
  28. 		if (day > days[month-1]) return false;
  29.  
  30. 		if (!isDigits(parts[2], 2)) return false;
  31. 		int year = Integer.parseInt(parts[2]);
  32.  
  33. 		return true;
  34. 	}
  35.  
  36. 	private static void test(String date) {
  37. 		String valid = validDate(date) ? "is" : "isn't";
  38. 		System.out.println(date + " " + valid + " a valid date.");
  39. 	}
  40.  
  41. 	public static void main (String[] args) throws java.lang.Exception
  42. 	{
  43. 		test("34-12-00");
  44. 		test("31-12-yy");
  45. 		test("31-02-14");
  46. 		test("22-10-14");
  47. 	}
  48. }
Success #stdin #stdout 0.07s 380224KB
comments (?)
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Standard input is empty
stdout
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34-12-00 isn't a valid date.
31-12-yy isn't a valid date.
31-02-14 isn't a valid date.
22-10-14 is a valid date.
https://ideone.com/EsrDAD
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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