import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.plaf.*;

import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.TableModel;
import javax.swing.table.DefaultTableModel;

public class LinkStart extends Frame {
// import javax.swing.table.AbstractTableModel; //
//Init vars
	int win_x = 500;			//Window size X
	int win_y = 500;			//Window size Y
	String[] columnNames = {"Link Postion", "Link Data"};
	Object[][] data = {null};
	
//Init items
	private Button addButon;
	private Button genButton;
	private Button editButton;
	private Button sortButton;
	

//Init the object - The all important one!
	LinkControl LinkData = new LinkControl();
	
//Init table stuff, also disable the cell edits
	TableModel model = new DefaultTableModel(data, columnNames);
	JTable table = new JTable(model){
      public boolean isCellEditable(int rowIndex, int colIndex) {
        return false;   //Disallow the editing of any cell
		}
    };
		
public LinkStart() 
    {
		//Set frame title and size
		super("Linked List GUI");
        setSize(win_x, win_y);
	
        //Listeners
        addWindowListener(
                new WindowAdapter() {
                    public void windowClosing(WindowEvent e) {
                        System.exit(0);
                    }
                }
        );
		
		final ActionListener buttonListener = new ActionListener() {
            public void actionPerformed(ActionEvent ae) {
                String action = ae.getActionCommand();
                if (action.equals("Add")) {
					LinkData.add();
                 } else if (action.equals("Generate")){
					LinkData.gen();
				 } else if (action.equals("Edit")){
					LinkData.edit(table);
				 } else if (action.equals("Sort")){
					LinkData.sort();
				} else {
                    System.out.println(action);
                }
            }
		};
				
		//Set toolbars
		Panel controlPanel = new Panel();
		Panel tablePanel = new Panel();
		//Create buttons 
		JButton addButton = new JButton("Add");
		JButton genButton = new JButton("Generate");
		JButton editButton = new JButton("Edit");
		JButton sortButton = new JButton("Sort");
		
		//Add buttons to the buttonListener
		addButton.addActionListener(buttonListener);
		genButton.addActionListener(buttonListener);
		editButton.addActionListener(buttonListener);
		sortButton.addActionListener(buttonListener);
		
		//Set tool tips for some simple help
		addButton.setToolTipText("Add to linked list");
		genButton.setToolTipText("Generate a new list");
		editButton.setToolTipText("Edit selected row");
		sortButton.setToolTipText("Sort by");
		
		//Add Items to panel and add panel
		controlPanel.add(addButton);
		controlPanel.add(genButton);
		controlPanel.add(editButton);
		controlPanel.add(sortButton);
		add(controlPanel, BorderLayout.SOUTH);
		
	
		JScrollPane scrollPane = new JScrollPane(table);
		table.setFillsViewportHeight(true);
		tablePanel.add(scrollPane);
		add(tablePanel, BorderLayout.CENTER);
	}

public static void main(String Args[]) 
	{
		LinkStart LinkFrame = new LinkStart();
        LinkFrame.setVisible(true);
		
	}

}

import java.util.LinkedList;
import java.util.Iterator;
import java.util.ListIterator;
import javax.swing.JTable;
import java.util.Random;
import javax.swing.table.TableModel;
class LinkControl
{
LinkedList LinkObject = new LinkedList();
Iterator iterator;
int i;

public LinkControl()
		{
		System.out.println("Link control() works");
		}
	
void add()
		{
		System.out.println("Link control.add() works");
		}
		
void gen()
		{
		
		System.out.println("Link control.gen() works");
		//We must set the first and last entrys before we add anything else, otherwise the java program throws a fit
		LinkObject.addFirst(randomData());
		LinkObject.addLast(randomData());
		//loop through and add 10 more entrys
		for (i = 1; i<=10; i ++){
		LinkObject.add(i,randomData());
		}

		// purely for debuging, just to check the list
		iterator = LinkObject.iterator();
		while (iterator.hasNext()){
			System.out.println(iterator.next()+" ");  
			//System.out.println(iterator.nextIndex()+" ");
			}		
	}

void edit(JTable table)
		{
		System.out.println("Link control.edit() works");
		System.out.println(table.getValueAt(getFocusRow(table), 0));
		}
		
void sort()
		{
		System.out.println("Link control.sort() works");
		}
		
public static int getFocusRow(JTable table) {
		return table.getSelectionModel().getLeadSelectionIndex();
		//System.out.println(table.getSelectionModel().getLeadSelectionIndex());
		}		
public static int getFocusColumn(JTable table) {
		return table.getColumnModel().getSelectionModel().getLeadSelectionIndex();
		}
		
public static long randomData(){
		Random rand = new Random();
		return rand.nextLong();
		}
	
}