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

Keywords/tags

java, swing, JTable, table, radio, button, click, clickable, cell, renderer, editor, model, TableModel, example, sample, source

The source code

/* (swing1.1.1) */
package tame.examples;

import java.awt.Component;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.DefaultCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;

/**
@author Nobuo Tamemasa
@version 1.2 08/13/99
*/
public class JRadioButtonTableExample2 extends JFrame {

  public JRadioButtonTableExample2(){
    super( "JRadioButtonTable Example" );

    DefaultTableModel dm = new DefaultTableModel();
    dm.setDataVector(
      new Object[][]{
        {"1",new Integer(-1)},
        {"2",new Integer(-1)},
        {"3",new Integer(0)},
        {"4",new Integer(1)},
        {"5",new Integer(2)}},
      new Object[]{"Question","Answer"});

    JTable table = new JTable(dm);
    String[] answer = {"A","B","C"};

    table.getColumn("Answer").setCellRenderer(
      new RadioButtonRenderer(answer)
    );
    table.getColumn("Answer").setCellEditor(
      new RadioButtonEditor(new JCheckBox(),
                            new RadioButtonPanel(answer))
    );
    JScrollPane scroll = new JScrollPane(table);
    getContentPane().add( scroll );
  }

  // Cell base
  class RadioButtonPanel extends JPanel {
    JRadioButton[] buttons;

    RadioButtonPanel(String[] str) {
      setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
      buttons = new JRadioButton[str.length];
      for (int i=0; i<buttons.length; i++) {
        buttons[i] = new JRadioButton(str[i]);
        buttons[i].setFocusPainted(false);
        add(buttons[i]);
      }
    }

    public void setSelectedIndex(int index) {
      for (int i=0;i<buttons.length;i++) {
        buttons[i].setSelected(i == index);
      }
    }

    public int getSelectedIndex() {
      for (int i=0; i<buttons.length; i++) {
        if (buttons[i].isSelected()) {
          return i;
        }
      }
      return -1;
    }

    public JRadioButton[] getButtons() {
      return buttons;
    }
  }

  class RadioButtonRenderer extends    RadioButtonPanel
                            implements TableCellRenderer {
    RadioButtonRenderer(String[] strs) {
      super(strs);
    }

    public Component getTableCellRendererComponent(JTable table, Object value,
                   boolean isSelected, boolean hasFocus, int row, int column) {
      if (value instanceof Integer) {
        setSelectedIndex(((Integer)value).intValue());
      }
      return this;
    }
  }

  class RadioButtonEditor extends    DefaultCellEditor
                          implements ItemListener {
    RadioButtonPanel panel;

    public RadioButtonEditor(JCheckBox checkBox,RadioButtonPanel panel) {
      super(checkBox);
      this.panel = panel;
      ButtonGroup buttonGroup = new ButtonGroup();
      JRadioButton[] buttons  = panel.getButtons();
      for (int i=0; i<buttons.length; i++) {
        buttonGroup.add(buttons[i]);
        buttons[i].addItemListener(this);
      }
    }

    public Component getTableCellEditorComponent(JTable table, Object value,
                   boolean isSelected, int row, int column) {
      if (value instanceof Integer) {
        panel.setSelectedIndex(((Integer)value).intValue());
      }
      return panel;
    }

    public Object getCellEditorValue() {
      return new Integer(panel.getSelectedIndex());
    }

    public void itemStateChanged(ItemEvent e) {
      super.fireEditingStopped();
    }
  }

  public static void main(String[] args) {
    JRadioButtonTableExample2 frame = new JRadioButtonTableExample2();
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
    frame.setSize( 230, 140 );
    frame.setVisible(true);
  }
}