what's wrong with this source code.

it is showing the message applet is not initiallising.
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class LinearSearch extends JApplet implements ActionListener
{
 JLabel enterLabel;
 JTextField enter;
 JTextArea outputArea1, outputArea2;
 JButton search;
 String output;
 int a[];

 public void init()
 {
   a=new int[Integer.parseInt(JOptionPane.showInputDialog("how many
numbers, you want to input:"))];

   for(int i=0; i<a.length; ++i)
     a[i]=Integer.parseInt(JOptionPane.showInputDialog("enter the
integer number."));

   output="numbers are:\n";
   for(int i=0; i<a.length; ++i)
     output += " "+a[i];

   for(int i=1; i<a.length; ++i)
     for(int j=0; j<=a.length-1; ++j)
       if(a[j]>a[j+1])
       {
         int t=a[j];
          a[j]=a[j+1];
          a[j+1]=t;
       }

   output += "\n\nnow numbers are in ascending order.\n";
   for(int i=0; i<a.length; ++i)
    output += " "+a[i];

   Container c=getContentPane();
   c.setLayout(new FlowLayout());

   outputArea1=new JTextArea();
   c.add(outputArea1);
   outputArea1.setText(output);

   enterLabel=new JLabel("enter the number, you want to search.");
   c.add(enterLabel);

   enter=new JTextField(10);
   enter.addActionListener(this);
   c.add(enter);

   outputArea2=new JTextArea();
   c.add(outputArea2);

   search=new JButton("new search");
   search.addActionListener(this);
   c.add(search);
 }

 public void actionPerformed(ActionEvent e)
 {
   if(e.getSource() == enter)
   {
     int subscript=linearSearch(a,
Integer.parseInt(e.getActionCommand()));

     if(subscript != -1)
      outputArea2.setText("number found at position no. "+subscript+"
in the sorted list.");

     else
     outputArea2.setText("Sorry!!! number not found. \n\nhave a look
on new search");
   }

   else
     JOptionPane.showMessageDialog(null, "Please click on the Applet
menu on the menu Bar.\n"+"click on the clone option.\n"+"Repeat the
search process again.");
 }

 public int linearSearch(int b[], int k)
 {
   for(int i=0; i<b.length; ++i)
     if(b[i] == k)
      return i;

   return -1;
 }
}

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it is asking for no. of elements. and input the numbers. but after then
applet is not able to initialise.