Errata for Developing Java Beans

rob.englander@worldnet.att.net To: rob@mindstrm.com

The second complete sentence in the first paragraph did read: "...other criteria that..." Now reads: "...other criterion that..."

is the base class for all components to: is the base class for many components

setLabel(new Integer(count).toString)); to: setLabel(String.valueOf(count));

this(``"); to: this("");

protected void temperature2Changed(double newTemp); to: protected void temperature2Changed(double newTemp)

if (thermometer1 == evt.getSource()) to: if (temperature1 == evt.getSource())

if (thermometer2 == evt.getSource()) to: if (temperature2 == evt.getSource())

to "implements TempChangeListener"

Changed TemperatureAdapter1() { super(theTemperature1); } to: TemperatureAdapter1(Temperature t) { super(t); }

TemperatureAdapter2() { super(theTemperature2); } to: TemperatureAdapter2(Temperature t) { super(t); }

(double newTemp); to (double newTemp)

that adapts the TempChangedListener to: that adapts the TempChangeListener

Changed tempAdapter.registerEventHandler(theTemperature1, "temperature1Changed"); tempAdapter.registerEventHandler(theTemperature2, "temperature2Changed"); to: try { tempAdapter.registerEventHandler(theTemperature1, "temperature1Changed"); tempAdapter.registerEventHandler(theTemperature2, "temperature2Changed"); } catch (NoSuchMethodException e) { System.out.println(e); }

protected void temperature1Changed to: public void temperature1Changed also changed: protected void temperature2Changed to: public void temperature2Changed

public GenericButtonAdapter(Object target) to public GenericButtonAdapter(Object target) throws ClassNotFoundException

"ActionEvent"

Button b = e.getSource(); to: Button b = (Button)e.getSource(); also changed: public void handleB3(MouseEvent e) to: public void handleB#(ActionEvent e)

evt.getTemperature() > highTemperature) to: evt.getTemperature() > highThreshold)

public void pollSent(PollEvent e) to: public synchronized void pollSent(PollEvent e) also changed this.resume(); to: this.notify();

this.suspend(); to: try { this.wait(); } catch (Exception e) { }

theTemperature. addTempChangeListener(this); to: theTemperature.addTempChangeListener(this);

PropertyChangedEvent evt = to: PropertyChangeEvent evt = also changed new PropertyChangedEvent to: new PropertyChangeEvent

and ending with "look like if we did:" and also eliminate the entire code sample on page {71}.

protected Temperature theTemperature;

our own criteria to: our own criterion

throw new PropertyVetoException(); to: PropertyChangeEvent e = new PropertyChangeEvent(this, "MinimumTemperature", null, new Double(newVal)); throw new PropertyVetoException("Bad MinimumTemperature", e);

The third sentence in the second paragraph did read: "...property of both labels..." Now reads: "...properties of both labels..."

also, changed "s.readObject" to "stream.readObject"

ARCHIVES to: ARCHIVE

Beans.util.PickleButton to: BeansBook.util.PickleButton

java.io.PropertyChangeEvent to: java.beans.PropertyChangeEvent

simulator tend to be to: simulator tends to be

// boolean bWriteNull to: boolean bWriteNull

The first line on the page did read: "... kind of user interface. Now reads: "... kind of interesting user interface.

import java.io.*;

and ambientTemperature to: and ambientTemp

setNeedsCooling((ambientTemp > comfortTemp) && (ambientTemp - comfortTemp >= 1.0)); setNeedsHeating((ambientTemp < comfortTemp) && (comfortTemp - ambientTemp >= 1.0)); to: setNeedsCooling(ambientTemp - comfortTemp >= 1.0); setNeedsHeating(comfortTemp - ambientTemp >= 1.0);

new Integer(d.longValue to: new Long(d.longValue

setNeedsCooling((ambientTemp > comfortTemp) && (ambientTemp - comfortTemp >= 1.0)); setNeedsHeating((ambientTemp < comfortTemp) && (comfortTemp - ambientTemp >= 1.0)); to: setNeedsCooling(ambientTemp - comfortTemp >= 1.0); setNeedsHeating(comfortTemp - ambientTemp >= 1.0);

changed "if (heatingListeners!= null)" to "if (heatingListeners != null)"

changed "s.readObject" to "stream.readObject"

catch (IntrospectionException e) { return null; }

temperaturePulse(new TemperaturePulseEvent(null, pulse)); to: temperaturePulse(new TemperaturePulseEvent(this, pulse));

I've passed null as the first parameter to the constructor, indicating that the actual source of the pulse is unknown.

Rob Englander is the President and Principal Engineer at MindStream Software, Inc., a firm specializing in custom software development in Java and C++ for a wide range of application areas.