JLists in JScrollPane in JFrame

Question

im writing a form class it extends JFrame has a number of jtextfields and labels
im trying to add a JList in a JScrollPane
the list works alone
everytime i try adding it to a scrollpane it just doesnt show
im not getting any errors either
any ideas
jstfsklh211

Answer 1

import java.awt.*;
import java.sql.*;
import java.lang.Object;
import javax.swing.*;
import java.util.*;
public class addevent extends JFrame{
     //input fields with options
     JComboBox eventType, salesman;
     JCheckBox flrplan;
     //textfields for input
     JTextField date, location, count, ctlstart, cerstart,
          dinstart, valnum, valstart, npkn, kipot, textbox,
          custinfoID;
     JList ctllist,dinlist, buflist;
     JButton Add, menu;
     //labels for customer info
     JLabel custinfof, custinfol, custinfop, custinfoc;
     //connection variables
     startup bridge = new startup();
     Connection con = null;
     Statement stmt = null;
     ResultSet rs = null;
     Vector vector1 = null;
     private String custID, query;
     int j;
     public addevent(String title){
          this.setTitle(title);
          //header
          JLabel line = new JLabel();
          line.setLocation(0,30);
          line.setSize(900,1);
          line.setBorder(BorderFactory.createMatteBorder(0,0,1,0,Color.black));
          //lists
          itemlist("query");
          ctllist = new JList(vector1);
          ctllist.setSize(200, 250);
          ctllist.setLocation(50, 160);
          itemlist("query");
          dinlist = new JList(vector1);
          dinlist.setSize(200, 250);
          dinlist.setLocation(350, 160);
          itemlist("query");
          buflist = new JList(vector1);
          buflist.setSize(200, 250);
          buflist.setLocation(650, 160);
          textbox = new JTextField();
          textbox.setVisible(false);
          Container contentPane = this.getContentPane();
          JScrollPane ctlpane = new JScrollPane(ctllist);
          JScrollPane dinpane = new JScrollPane(dinlist);
          JScrollPane bufpane = new JScrollPane(buflist);
          contentPane.add(ctlpane);
          contentPane.add(dinpane);
          contentPane.add(bufpane);
          contentPane.add(textbox);
          this.pack();
          this.setSize(900,550);
          this.setLocationRelativeTo(null);
          this.setVisible(true);
          catlist list = new catlist();
     public void salesman(){
          try {
                 query = "select * from salesman;";
                 con = bridge.getConnection();
                 stmt = con.createStatement();
                 rs = stmt.executeQuery(query);
                 while(rs.next())
                      salesman.addItem(rs.getString(1));
          catch(Exception ex){ex.printStackTrace();}
          finally {
               try {
                    if (rs != null)
                         rs.close();
               catch(Exception ex) {ex.printStackTrace();}
               try {
                    if (stmt != null)
                         stmt.close();
               catch(Exception ex) {ex.printStackTrace();}
     public void eventType(){
          try {
                 query = "select * from eventType;";
                 con = bridge.getConnection();
                 stmt = con.createStatement();
                 rs = stmt.executeQuery(query);
                 while(rs.next())
                      eventType.addItem(rs.getString(1));
          catch(Exception ex){ex.printStackTrace();}
          finally {
               try {
                    if (rs != null)
                         rs.close();
               catch(Exception ex) {ex.printStackTrace();}
               try {
                    if (stmt != null)
                         stmt.close();
               catch(Exception ex) {ex.printStackTrace();}
     public void itemlist(String query){
          try {
               vector1 = new Vector();
               con = bridge.getConnection();
               stmt = con.createStatement();
               query = "select distinct type from food;";
               rs = stmt.executeQuery(query);
               while(rs.next()) vector1.add(rs.getObject(1));
          catch(Exception ex){ex.printStackTrace();}
          finally {
               try {
                    if (rs != null)
                         rs.close();
               catch(Exception ex) {ex.printStackTrace();}
               try {
                    if (stmt != null)
                         stmt.close();
               catch(Exception ex) {ex.printStackTrace();}
}//end classi pulled out about 20 buttons, lables, and textfields
and mutiple get and sets for the text fields
Message was edited by:
jstfsklh211
Message was edited by:
jstfsklh211