Eclipse FieldEditor

Simplifying Preference Pages with Field Editors
JFace preferences and field editors

//-- Main.java --
import java.io.IOException;

import org.eclipse.jface.preference.PreferenceStore;
import org.eclipse.jface.preference.RadioGroupFieldEditor;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class Main {

  public static void main(String[] args) throws IOException {

    PreferenceStore ps = new PreferenceStore("RadioGroupFieldEditor.properties");
    try {
      ps.load();
    } catch (IOException e) {
    }

    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("RadioGroup");
    shell.setLayout(new FillLayout());

    String[][] labelAndValues = new String[][] { 
        { "Red", "1" },
        { "Green", "2" }
    };
    RadioGroupFieldEditor radioGroupEditor = new RadioGroupFieldEditor(
        "color", "Radio Group", 2,
        labelAndValues, shell, true);

    IPropertyChangeListener listener = new IPropertyChangeListener() {

      @Override
      public void propertyChange(PropertyChangeEvent event) {
        Object newValue = event.getNewValue();
        if (event.getOldValue() != newValue) {
          System.out.println(newValue);
        }
      }

    };

    radioGroupEditor.setPropertyChangeListener(listener);
    radioGroupEditor.setPreferenceStore(ps);
    radioGroupEditor.load();
    
    shell.pack();
    shell.open();

    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    radioGroupEditor.store();
    
    display.dispose();
    
    ps.save();
  }
}