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Get Length of Array

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In this Tutorial we make a simple example to understand Get Length of Array in Java Script.

Get Length of Array

     

In this Tutorial we make a simple example to understand Get Length of Array in Java Script. In this code we import a  package java.util and java. text.

Packages used in code  - 

1)Java.util.  -  This includes  the collections framework, legacy collection classes, event model, date and time facilities and internationalization..

2)Java.text  -  This includes  the classes and interfaces used  for handling text, dates, numbers, and messages.

Methods used in code  -

1)Format formatter  = new SimpleDateFormat("MMMM")  - This method return you a SimpleDateFormat, this allows for formatting (i.e., date -> text), parsing (text -> date), and normalization. The date is represented as a Date object or the milliseconds since January 1, 1970, 00:00:00 GMT.

2)Calendar.get Instance( ) - This method return you the default time zone and current locale.

We declare a variable string array name month, that is used to instantiate an string object with initial size to hold 12 element. The for loop execute and run the script till the length i is less than length of string element.

3)Calendar.set(calendar.Month,i) - This method set you the calendar month.

4)calendar.gettime( )  -This method get you the calendar current time.

5)monthname.length ( )-This method return you the length of the month.

The var  month instantiate an array object that hold the size of month. The for loop run and execute the script till the length of i is less than  month. The document. write print the list of month in a year.

 

Array Elements.jsp

<html>
  <head>
  <title>Array Elements</title>
  
  <%page import="java.util.*" %>
  <%page import="java.text.*" %>
  <%
  Format formatter = new SimpleDateFormat("MMMM");
  Calendar calendar = Calendar.getInstance();
  String[] monthName = new String[12];

  for (int i = 0; i < 12; i++) {
  calendar.set(Calendar.MONTH, i);
  monthName[i= formatter.format(calendar.getTime());
  }

  int month = monthName.length;
  %>
  </head>
  
  <body>
  <script>  
  var month = new Array(<%=month%>);

  <%for (int i = 0; i < month; i++) {%>
  month[<%=i%>"<%=monthName[i]%>";

  <%}%>
  document.write("<h2>Elements of the array</h2>");
  fori = 0; i < month.length; i++){
  document.write("<b>"+month[i]+"</b><br>");
  }
  </script> 
  </body>
</html>

Output

Download code

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Posted on: November 11, 2008

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