Simple demonstration of JTable : Table « Swing JFC « Java

Simple demonstration of JTable

Simple demonstration of JTable
// :
// Simple demonstration of JTable.
// <applet code=Table width=350 height=200></applet>
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// See copyright notice in CopyRight.txt.

import java.awt.BorderLayout;
import java.awt.Container;

import javax.swing.JApplet;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;

public class JTableDemo extends JApplet {
  private JTextArea txt = new JTextArea(4, 20);

  // The TableModel controls all the data:
  class DataModel extends AbstractTableModel {
    Object[][] data = { { "one", "two", "three", "four" },
        { "five", "six", "seven", "eight" },
        { "nine", "ten", "eleven", "twelve" }, };

    // Prints data when table changes:
    class TML implements TableModelListener {
      public void tableChanged(TableModelEvent e) {
        txt.setText(""); // Clear it
        for (int i = 0; i < data.length; i++) {
          for (int j = 0; j < data[0].length; j++)
            txt.append(data[i][j] + " ");

    public DataModel() {
      addTableModelListener(new TML());

    public int getColumnCount() {
      return data[0].length;

    public int getRowCount() {
      return data.length;

    public Object getValueAt(int row, int col) {
      return data[row][col];

    public void setValueAt(Object val, int row, int col) {
      data[row][col] = val;
      // Indicate the change has happened:

    public boolean isCellEditable(int row, int col) {
      return true;

  public void init() {
    Container cp = getContentPane();
    JTable table = new JTable(new DataModel());
    cp.add(new JScrollPane(table));
    cp.add(BorderLayout.SOUTH, txt);

  public static void main(String[] args) {
    run(new JTableDemo(), 350, 200);

  public static void run(JApplet applet, int width, int height) {
    JFrame frame = new JFrame();
    frame.setSize(width, height);
} ///:~


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