Bug 30170 [Preferences] editors preferences not stored on OK?
20030121 my eclipse hard-crashed and it seems that the 'number of open editors' preference was lost preference pages should store their values on OK. i guess the 'Editors' page forgot to do it.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceStore.java
*/
public long getDefaultLong(String name) {
	return getLong(defaultProperties, name);
}
/* (non-Javadoc)
 * Method declared on IPreferenceStore.
 */
public String getDefaultString(String name) {
	return getString(defaultProperties, name);
}
/* (non-Javadoc)
 * Method declared on IPreferenceStore.
 */
public double getDouble(String name) {
	return getDouble(properties, name);
}
/**
 * Helper function: gets double for a given name.
 */
private double getDouble(Properties p, String name) {
	String value = p != null ? p.getProperty(name) : null;
	if (value == null)
		return DOUBLE_DEFAULT_DEFAULT;
	double ival = DOUBLE_DEFAULT_DEFAULT;
	try {
		ival = new Double(value).doubleValue();
	} catch (NumberFormatException e) {
	}
	return ival;
}