JScroller problem

Question

Hello,
I have had this proble for a week now and I cannot figure out what is wrong. Whenever I run this code without adding the JScroller there is no problem. As soon as I add the JScroller, I get swing run time errors. Can anyone please help me ? I am a comment on the line that causes the trouble. Its near the end.
Thanks
Michael
package test5;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.awt.*;
import java.net.*;
import java.io.*;
import javax.swing.table.*;
import java.util.*;
public class clientgui extends JFrame{
private JButton client_open; //
private JButton client_refresh; //
private JButton client_search; //
private JButton client_quit; // GUI Components for various purposes..
private JButton client_view_files; //
private JTable client_listing; //
private JScrollPane client_scroller; //
int count = 0;
Container contentpane; // For the placeing the GUI Componments
JLabel copy;
TableModel default_table; //
String names[] = {"Users Connected"}; // For JTable GUI Component
Object data[][] ={{null},{null},{null},{null},{null},{null}, {null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null},{null}};
private URLConnection urlconnection; //
private InputStream url_inputstream; // For Connecting and gaining the information..
private Socket client_socket;
boolean go_on = true;
boolean check = true;
Vector values = new Vector();
String information[][];
int g;
add_on connection;
public clientgui(String param, String us, String fs, String present_users[][])
try{
contentpane = getContentPane();
contentpane.setLayout(null); // Setting the Layout to Absolute Layout..
copy = new JLabel("P2P FileSharing");
copy.setBounds(20,5,200,15);
contentpane.add(copy);
client_open = new JButton("Open"); // Initializing the GUI Component.
client_open.setMnemonic('O'); // Setting the Mnemonic..
client_open.setBounds(20,20,80,35); // Positioning the GUI Component.
client_refresh = new JButton("Refresh"); // Initializing the GUI Component.
client_refresh.setMnemonic('R'); // Setting the Mnemonic..
client_refresh.setBounds(100,20,80,35); // Positioning the GUI Component.
client_search = new JButton("Search"); // Initializing the GUI Component.
client_search.setMnemonic('S'); // Setting the Mnemonic..
client_search.setBounds(180,20,80,35); // Positioning the GUI Component.
client_view_files = new JButton("View Files"); // Initializing the GUI Component.
client_view_files.setMnemonic('V'); // Setting the Mnemonic..
client_view_files.setBounds(260,20,100,35); // Positioning the GUI Component.
client_view_files.setEnabled(false);
client_quit = new JButton("Quit"); // Initializing the GUI Component.
client_quit.setMnemonic('Q'); // Setting the Mnemonic..
client_quit.setBounds(360,20,80,35);// Positioning the GUI Component.
default_table = new AbstractTableModel()
// These methods always need to be implemented.
public int getColumnCount() { return names.length; }
public int getRowCount() { return data.length;}
public Object getValueAt(int row, int col) {return data[row][col];}
// The default implementations of these methods in
// AbstractTableModel would work, but we can refine them.
public String getColumnName(int column) {return names[column];}
public Class getColumnClass(int col) {return getValueAt(0,col).getClass();}
public boolean isCellEditable(int row, int col) {return (col==4);}
public void setValueAt(Object aValue, int row, int column) {
data[row][column] = aValue;
fireTableCellUpdated(row, column);
client_listing = new JTable(default_table);
client_listing.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
client_listing.getTableHeader().setReorderingAllowed(false);
client_listing.setBounds(10,55,440,300);
client_listing.setGridColor(new Color(255,255,255));
client_listing.setBackground(new Color(255,255,255));
client_view_files.setEnabled(true);
client_scroller = new JScrollPane();
client_scroller.setBounds(10,55,440,300);
client_scroller.setViewportView(client_listing);// Adding the Table...
contentpane.add(client_scroller); // PROBLEM LINE
contentpane.add(client_open); //
contentpane.add(client_refresh); //
contentpane.add(client_search); // Adding the GUI Buttons.....
contentpane.add(client_view_files); //
contentpane.add(client_quit);
setSize(550,550);
catch(Exception e)
System.out.println("Error gui "+e.getMessage());
public static void main(String args[])
String p="search";
String u="pic.jpg";
String f="pic.jpg";
String ps[][]={{" "," "}};
clientgui g=new clientgui(p,u,f,ps);
g.show();
}

Answer 1

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