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What this is

This file is part of the Tame Swing collection that we have compiled. All of the Java source code in these examples was created by Nobuo Tamemasa. As these examples have become hard to find on the internet, we have put them in one place here, supported by minimal advertising. In time we will include images of each running sample Java/Swing application.

The intent of having these files here is to help you learn Java and Swing by example, and Tame certainly created some terrific examples of the power of the Swing framework.

Other links


java, swing, JTable, tool, tip, tooltip, custom, help, hover, header, cell, renderer, table, model, TableModel, example, sample, source

The source code

/* (swing1.1) */
package tame.examples;

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

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumnModel;

@author Nobuo Tamemasa
@version 1.0 02/25/99
public class ToolTipHeaderTableExample extends JPanel {

  public ToolTipHeaderTableExample(){
    setLayout(new BorderLayout());
    String[] headerStr  = {"default","jw"      ,"ja"      ,"la"   ,"unknown"};
    String[] toolTipStr = {""       ,"Javanese","Japanese","Latin"};

    DefaultTableModel dm = new DefaultTableModel(headerStr, 4);
    JTable table = new JTable(dm);

    ToolTipHeader header = new ToolTipHeader(table.getColumnModel());
    header.setToolTipText("Default ToolTip TEXT");

    JScrollPane pane = new JScrollPane(table);
    add(pane, BorderLayout.CENTER);

  public static void main(String[] args) {
    JFrame f= new JFrame("ToolTipHeaderTable Example");
    f.getContentPane().add(new ToolTipHeaderTableExample(), BorderLayout.CENTER);
    f.setSize(400, 100);
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {System.exit(0);}

  class ToolTipHeader extends JTableHeader {
    String[] toolTips;

    public ToolTipHeader(TableColumnModel model) {

    public String getToolTipText(MouseEvent e) {
      int col  = columnAtPoint(e.getPoint());
      int modelCol = getTable().convertColumnIndexToModel(col);
      String retStr;
      try {
        retStr = toolTips[modelCol];
      } catch (NullPointerException ex) {
        retStr = "";
      } catch (ArrayIndexOutOfBoundsException ex) {
        retStr = "";
      if (retStr.length() < 1) {
        retStr = super.getToolTipText(e);
      return retStr;

    public void setToolTipStrings(String[] toolTips) {
      this.toolTips = toolTips;

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