Linear Search

Question

I got this Linear input example from many site and somehow its standard.
Question:
1)What to add to ActionListenerListener class so that it will go to search class,Search class is on a seperate file .Example of the ActionListener is below Search class.
2)How to modify the Search class or actionListener,so that when a serial no is keyed in, it will return the value to the textield in the GUI
Example:Assume there is 5 data IcNum,Brand ,model,Cost,SerialNo that is already stored inside as a single object.
Stupid GUI
Enter SerialNO: ****** 10AHT0UjaiUja6 (textfield)*
*Search button *
Model :****
Cost :                                                                        -      
(when search is pressed and matched Serial No, it will show entry that is already stored on the empty textfield even though there is 5 data in a single object and asked to return 2 of them)
public class Search
     public static int linearSearch(int[] a, int first, int upto, int key) {
    for (int i = first; i < upto; i++) {
        if (key == a) {
return i; // Found key, return index.
return -1; // Failed to find key
Example of my Listener
  b.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
        });RockmanEXE

Answer 1

1) Next time be more specific about exactly what problem you're having. Paste in the error and indicate exactly which line it's occurring on or describe the observed vs. expected behavior in detail.
2) = is for assignment, == is for comparison.
3) You don't need compareTo() here. equals() will do fine.