Add validation to make sure the input values entered are integers and format Java code

Author: lulunac27a

datetime-jsp/datetime.html

@@ -14,6 +14,7 @@ <h1>Enter date and time values</h1>
         type="number"
         name="year"
         id="year"
+        step="1"
         required
         onchange="getDaysInMonth()"
       /><br />
@@ -24,6 +25,7 @@ <h1>Enter date and time values</h1>
         id="month"
         min="1"
         max="12"
+        step="1"
         required
         onchange="getDaysInMonth()"
       /><br />
@@ -34,6 +36,7 @@ <h1>Enter date and time values</h1>
         id="day"
         min="1"
         max="31"
+        step="1"
         required
       /><br />
       <label for="hour">Hour:</label><br />
@@ -43,6 +46,7 @@ <h1>Enter date and time values</h1>
         id="hour"
         min="0"
         max="23"
+        step="1"
         required
       /><br />
       <label for="minute">Minute:</label><br />
@@ -52,6 +56,7 @@ <h1>Enter date and time values</h1>
         id="minute"
         min="0"
         max="59"
+        step="1"
         required
       /><br />
       <label for="second">Second:</label><br />
@@ -61,6 +66,7 @@ <h1>Enter date and time values</h1>
         id="second"
         min="0"
         max="59"
+        step="1"
         required
       /><br />
       <label for="millisecond">Millisecond:</label><br />
@@ -70,6 +76,7 @@ <h1>Enter date and time values</h1>
         id="millisecond"
         min="0"
         max="999"
+        step="1"
         required
         value="0"
       /><br />
@@ -80,6 +87,7 @@ <h1>Enter date and time values</h1>
         id="microsecond"
         min="0"
         max="999"
+        step="1"
         required
         value="0"
       /><br />
@@ -90,6 +98,7 @@ <h1>Enter date and time values</h1>
         id="nanosecond"
         min="0"
         max="999"
+        step="1"
         required
         value="0"
       /><br />