Java Application Program Error

Asked Jun 02 '15 at 06:10

Active Jun 02 '15 at 06:12

Viewed 27 times

i get the following error while running a packet sniffer code:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
    at ps.MainGUI.startbtnActionPerformed(MainGUI.java:399)
    at ps.MainGUI.access$000(MainGUI.java:26)

what could be the reason??the program code is give below :

 // TODO add your handling code here:
 startPacketbtn();
 ps.startUpdating();

and

public class MainGUI extends javax.swing.JFrame {

public DefaultTableModel dtmPacket = new DefaultTableModel();
PSCaptor ps;
/** Creates new form MainGUI */
public MainGUI(int bufsize,boolean mode,int deviceno) {
    initComponents();
    System.out.println("HERE");

edited Jun 02 '15 at 06:12

Jon Skeet

1,421,763
867
9,128
9,194

asked Jun 02 '15 at 06:10

SANDEEP S

1

Do you know what a NullPointerException is? If not, what happened when you researched it? – Kon Jun 02 '15 at 06:10
The error says it: What's going on in line 26 in MainGUI.java ? – Nir Alfasi Jun 02 '15 at 06:12
You never initialized ps. Change `PSCaptor ps;` to `PSCaptor ps = new PSCaptor();` – Tot Zam Jun 02 '15 at 06:13

Java Application Program Error

0 Answers0