MainClass.java Source code

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Here is the source code for MainClass.java

Source

/*Type: Interval Added
, Index0: 0
, Index1: 0
[First, a, b, c, d]
Type: Interval Added
, Index0: 5
, Index1: 5
[First, a, b, c, d, Last]
Type: Interval Added
, Index0: 3
, Index1: 3
[First, a, b, Middle, c, d, Last]
Type: Contents Changed
, Index0: 0
, Index1: 0
[New First, a, b, Middle, c, d, Last]
Type: Contents Changed
, Index0: 6
, Index1: 6
[New First, a, b, Middle, c, d, New Last]
Type: Interval Added
, Index0: 7
, Index1: 7
[New First, a, b, Middle, c, d, New Last, a]
Type: Interval Added
, Index0: 8
, Index1: 8
[New First, a, b, Middle, c, d, New Last, a, b]
Type: Interval Added
, Index0: 9
, Index1: 9
[New First, a, b, Middle, c, d, New Last, a, b, c]
Type: Interval Added
, Index0: 10
, Index1: 10
[New First, a, b, Middle, c, d, New Last, a, b, c, d]
Type: Interval Removed
, Index0: 0
, Index1: 10
[]
    
 * */
import java.awt.BorderLayout;

import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;

public class MainClass {
    static String labels[] = { "a", "b", "c", "d" };

    public static void main(String args[]) {
        JFrame frame = new JFrame("Modifying Model");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        final DefaultListModel model = new DefaultListModel();
        for (int i = 0, n = labels.length; i < n; i++) {
            model.addElement(labels[i]);
        }
        JList jlist = new JList(model);
        JScrollPane scrollPane1 = new JScrollPane(jlist);
        frame.add(scrollPane1, BorderLayout.WEST);

        ListDataListener listDataListener = new ListDataListener() {
            public void contentsChanged(ListDataEvent listDataEvent) {
                appendEvent(listDataEvent);
            }

            public void intervalAdded(ListDataEvent listDataEvent) {
                appendEvent(listDataEvent);
            }

            public void intervalRemoved(ListDataEvent listDataEvent) {
                appendEvent(listDataEvent);
            }

            private void appendEvent(ListDataEvent listDataEvent) {
                switch (listDataEvent.getType()) {
                case ListDataEvent.CONTENTS_CHANGED:
                    System.out.println("Type: Contents Changed");
                    break;
                case ListDataEvent.INTERVAL_ADDED:
                    System.out.println("Type: Interval Added");
                    break;
                case ListDataEvent.INTERVAL_REMOVED:
                    System.out.println("Type: Interval Removed");
                    break;
                }
                System.out.println(", Index0: " + listDataEvent.getIndex0());
                System.out.println(", Index1: " + listDataEvent.getIndex1());
                DefaultListModel theModel = (DefaultListModel) listDataEvent.getSource();
                System.out.println(theModel);
            }
        };

        model.addListDataListener(listDataListener);

        model.add(0, "First");
        model.addElement("Last");
        int size = model.getSize();
        model.insertElementAt("Middle", size / 2);
        size = model.getSize();
        if (size != 0)
            model.set(0, "New First");
        size = model.getSize();
        if (size != 0)
            model.setElementAt("New Last", size - 1);
        for (int i = 0, n = labels.length; i < n; i++) {
            model.addElement(labels[i]);
        }
        model.clear();
        size = model.getSize();
        if (size != 0)
            model.remove(0);

        model.removeAllElements();
        model.removeElement("Last");
        size = model.getSize();
        if (size != 0)
            model.removeElementAt(size / 2);
        size = model.getSize();
        if (size != 0)
            model.removeRange(0, size / 2);
        frame.setSize(640, 300);
        frame.setVisible(true);
    }
}