LongListTest.java Source code

Introduction

Here is the source code for LongListTest.java

Source

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.AbstractListModel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class LongListTest extends JFrame implements ListSelectionListener {
    JLabel label = new JLabel();

    public LongListTest() {
        setTitle("LongListTest");
        setSize(400, 300);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        JList wordList = new JList(new WordListModel(300000));
        wordList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

        wordList.setFixedCellWidth(50);
        wordList.setFixedCellHeight(15);

        JScrollPane scrollPane = new JScrollPane(wordList);

        JPanel p = new JPanel();
        p.add(scrollPane);
        wordList.addListSelectionListener(this);

        getContentPane().add(p, "Center");

        getContentPane().add(label, "North");
    }

    public void valueChanged(ListSelectionEvent evt) {
        JList source = (JList) evt.getSource();
        String word = (String) source.getSelectedValue();
        label.setText(word);
    }

    public static void main(String[] args) {
        JFrame frame = new LongListTest();
        frame.show();
    }
}

class WordListModel extends AbstractListModel {
    private int length;

    public WordListModel(int n) {
        length = n;
    }

    public int getSize() {
        return length;
    }

    public Object getElementAt(int n) {
        return Integer.toString(n);
    }
}