Listen for a constrained property change : JavaBeans « Development « Java Tutorial

import java.beans.PropertyChangeEvent;
import java.beans.PropertyVetoException;
import java.beans.VetoableChangeListener;
import java.beans.VetoableChangeSupport;
public class Main {
    private double interest;
    private VetoableChangeSupport vcs = new VetoableChangeSupport(this);
    public Main() {
        vcs.addVetoableChangeListener(new VetoChangeListener());
    public double getInterest() {
        return interest;
    public void setInterest(double interest) {
        try {
            vcs.fireVetoableChange("interest", new Double(this.interest), new Double(interest));
             this.interest = interest;
        } catch (PropertyVetoException e) {
    public static void main(String[] args) {
        Main bean = new Main();
class VetoChangeListener implements VetoableChangeListener {
    public void vetoableChange(PropertyChangeEvent evt) throws PropertyVetoException {
        String eventName = evt.getPropertyName();
        if (eventName.equalsIgnoreCase("interest")) {
            double interest = ((Double) evt.getNewValue()).doubleValue();
            if (interest > 20.00) {
                throw new PropertyVetoException("Interest must be below 20.00", evt);                
            System.out.println("Interest applied = " + interest);

6.56.1.Listening for Changes to the Selected File in a JFileChooser Dialog
6.56.2.Get a list of selected files
6.56.3.Listening for Changes to the Current Directory in a JFileChooser Dialog
6.56.4.Displaying the Current Directory in the Title of a JFileChooser Dialog
6.56.5.Setting an Accessory Component in a JFileChooser Dialog
6.56.6.Convert a bean to XML persistence
6.56.7.Listen for bean's property change event
6.56.8.List property names of a Bean
6.56.9.Prevent bean's property being serialized to XML
6.56.10.Create an instance a Bean
6.56.11.Convert an XML persistence to bean
6.56.12.Determine bean's property type
6.56.13.Listen for a constrained property change
6.56.14.Bean has a single property called property.
6.56.15.Implementing a Bound Property
6.56.16.Implementing a Constrained Property: fires a PropertyChangeEvent whenever its value is about to be changed.
6.56.17.Instantiating a Bean
6.56.18.Listing the Property Names of a Bean
6.56.19.Getting and Setting a Property of a Bean
6.56.20.Get and set the value of a property in a bean using Expression and Statement
6.56.21.Get and set an Object type property
6.56.22.gets and sets a primitive type property
6.56.23.gets and sets an array type property
6.56.24.Serializing a Bean to XML: XMLEncoder only persists the value of public properties.
6.56.25.Deserializing a Bean from XML
6.56.26.Preventing a Bean Property from Being Serialized to XML
6.56.27.Serializing an Immutable Bean Property to XML
6.56.28.Listening for a Property Change Event: A property change event is fired when a bound property is changed.
6.56.29.Listening for a Vetoable Property Change Event
6.56.30.Read bean's property value
6.56.31.extends SimpleBeanInfo
6.56.32.Get and set properties on a bean
6.56.33.Process bean properties getter by applying the JavaBean naming conventions.
6.56.34.Is JavaBean Compliant Setter
6.56.35.Constructs a method name from element's bean name for a given prefix
6.56.36.Returns attribute's setter method. If the method not found then NoSuchMethodException will be thrown.