Hw to split the jpanel to 3 jpanels

Question

Hello frnds,
In the below mentioned code I need to split the teller panel to three teller can you give any suggestions.
thank you
suraw
package guis.views;
import guis.controllers.GeneralController;
import java.awt.Dimension;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.beans.PropertyChangeEvent;
import java.util.LinkedList;
import javax.swing.DefaultListModel;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
* This is a custom view panel that displays a "document" consisting of a single
* text element. Both the document and the text element respond to changes in
* the model state.
* @author Robert Eckstein
public class TellerPanelView extends View
     private JPanel tellerPanel,tellerSubPanel;
     private JList teller;
     private JLabel tellerInfo;
     private JSplitPane SplitPane;
     private LinkedList<String> customerAtTeller;
     private JScrollPane listScroller;
     private DefaultListModel tellerlist;
     // The controller used by this view
     private GeneralController controller;
     * Creates new form TextElementDisplayPanel
     * @param controller An object implenting the controller interface that
     * this view can use to process GUI actions
     public TellerPanelView(GeneralController controller) {
          this.controller = controller;
          initComponents();
          localInitialization();
     * Initialization method called from the constructor
     public void localInitialization() {
     /** This method is called from within the constructor to
     * initialize the form.
     private void initComponents() {
          tellerPanel = new JPanel(new GridLayout(2,1));          
     tellerInfo = new JLabel("Teller1: Teller2: Teller3:");
          teller = new JList();
          tellerlist = new DefaultListModel();
          teller.setModel(tellerlist);
          SplitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);          
          for (int a = 0; a <= 2; a++)
          listScroller = new JScrollPane(teller,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
          customerAtTeller = new LinkedList<String>();
          tellerPanel.add(tellerInfo);
          tellerPanel.add(listScroller);
     public JPanel getTellerPanel() {
          return tellerPanel;
     * Called by the controller when it needs to pass along a property change
     * from a model.
     * @param evt The property change event
     public void modelPropertyChange(PropertyChangeEvent evt) {
          if (evt.getPropertyName().equals(GeneralController.ADD_TRANSACTION)) {
               String cust = (String) evt.getNewValue();
               customerAtTeller.addLast(cust);
               tellerlist.addElement(cust);
          revalidate();
          repaint();
}

Answer 1

While it looks like you've split a panel, you really haven't. You've added spcific components to a JPanel that make it look like it's split.
Ingredients needed: a total of 4 JPanels, and 2 JSplitPanes
Step 1: Create 2 new JPanels, and then Create a JSplitPane that houses these two JPanels
JSplitPane jsp1 = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, jPanel2, jPanel3);
Step 2: Create a 3rd JPanel, and then Create a second JSplit Pane that holds the 3rd JPanel, the JSplitPane created in step 1
JSplitPane jsp2 = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, jPanel1, jsp1);
Step 3: Now, add the JSplitPane created in step 2 to your original JPanel
jsp0.add(jsp2); // modify the add according to the screen manager you're using
You'll want to set properties on EACH of the JSplitPanes:
((JSplitPane) jsp1).setDividerSize(6);
((JSplitPane) jsp1).setContinuousLayout(true);
((JSplitPane) jsp1).setResizeWeight( (iSliderPos * 0.01) ); // VERY IMPORTANT!!!
((JSplitPane) jsp1).setDividerLocation( (iSliderPos * 0.01) );
where int iSliderPos is 0 - 100
Gotchas: I may look like there is nothing there (empty screen) because there are no components in jsp1, jsp2, and jsp3.
You'll either need to put components on these JPanels, or force the JPanels to have some size by setting:
jpanel1.setMinimumSize(new Dimension(80, 60));
jpanel1.setPreferredSize(new Dimension(800, 600));
jpanel1.setMaximumSize(new Dimension(1600, 1200));
jpanel1.setBounds(0,0,800,600);
jpanel1.setBorder(blackLineBorder);
(repeat for jpanel2 and jpanel3)
and the split panes:
jsp1.setMinimumSize(new Dimension(80, 60));
jsp1.setPreferredSize(new Dimension(800, 600));
jsp1.setMaximumSize(new Dimension(1600, 1200));
jsp1.setBounds(0, 0, 800, 600);
(repeat for jsp2)
This was pretty frustrating for me the first couple (of hundred) times. Maybe try to get it working as 2 panels with one split first.
bcf