Errata List for
Understanding Object-Oriented Programming with Java

by Timothy A. Budd

Published by Addison-Wesley Longman

Chapter	Page	Description
1	5	first line, program=>problem (ss)
3	48	First sentence in Summary, design => analysis and design (rw)
4	53	code line 4, Your => My (rw)
4	57	System is defined in java.lang, not java.io (footnote) (jh)
4	60	closing curly brackets have improper alignment (rw)
5	70	Parg. 4, Line 17 => Line 16 (mm)
5	73	Statement that window can be resized is confusing (footnote) (tg)
5	76	closing curly brackets misaligned (rw)
6	82	6.1, 2nd Parag, intValue) => intValue() (mm)
6	85	2nd call on drawLine, ln => lh (ns)
6	86	GravityEffect should be double (rw)
6	90	line -1, defined => implemented (rw)
7	100	line -14, newElement => addElement (rw)
7	108	tread => thread (6 lines from bottom) (jt)
7	110	Inconsistent capitization in literal strings(jt)
7	112	line -7, mouseDown => mousePressed (rw)
7	112	line -6, line -7, procedure => method (ab)
7	113	See footnote
7	115	mouseReleased, must use e to call getX and getY(tg)
7	116	Question 3, command => method (rw)
7	117	Exercise 5, in the pallet => on the pallet (rw)
8	122	getClass returns Class, not String (jh)
10	166	line 8, theData.size() => size() (mk)
10	169	line -9, argument and type => argument any type (wb)
10	171	class AdulltFrogBehavior should extend FrogBehavior, not Behavior (wb)
11	185	Line -1, remove that (rw)
11	189	Exercise 2 has already been answered (rw)
12	194	code should not extend, should match page 153 (wb)
12	202	Line -9, initial => init (rw)
12	202	Line -1, Circle => aCircle (rw)
12	210	Reference should be to page 222, not 223 (tg)
13	205	getClass returns Class, not String (jh)
13	206	enable, disable replaced by SetEnabled(boolean) (jh)
13	208	repaint(Graphics) => should have no argument (tor)
13	211	lm.show => lm.show(p, "Two") (jh)
13	211	3 lines from bottom, comment wrong, top=>bottom(nd)
13	212	Replace doIt with DoIt (rw)
13	212	Closing curly braces misalligned (rw)
13	213	Closing curly braces misalligned (rw)
13	223	Closing curly braces misalligned (rw)
13	228	mbar => mBar and mitem => mItem througout (rw)
13	228	Closing curly braces misalligned (rw)
14	231	Sec 14.1, a virtual => an abtract (rw)
15	246	Sec 15.2, Gamma calls this Composite, Not Composition (rw)
16	260	fileOpenFailed => FileOpenFailed (rw)
16	262	Spurious curly bracket in front of catch (rw)
17	269	1st line, missing z in getTimezoneOffset (but see footnote) (wb)
18	281	number of colors is 2*24, not 2*512 (es)
20	324	2nd par, line 3, class => method (tg)
20	326	Runable=>Runnable (two n's) occurs more than once(tl)
21	343	Line -12, should be destroy(), not exit() (rw)
Glos	356	Under Protocol, no entry for Class Description Protocol (rw)
Index		Wikstrom, Ake should have accents (Wikström, Åke) (Öp)

Footnotes

Changes in painting Protocol

Note that the lastest revision of Swing (version 1.3) has made dramatic changes to the painting protocol. One no longer should override paint, for example, but instead override paintComponent. See http://java.sun.com/products/jfc/tsc/articles/painting/index.html#swing for further information.

import statements (Page 57)

To clarify the error on page 57, actually System is found in Java.lang (which does not ever need to be imported) but the printstream to which println copies is found in Java.io. Nevertheless, the import statement is not necessary, since the variable is only being used, not declared. The reason for this error is perhaps more relevant: I was trying to find a simple example where it would be necessary to use an import statement. An author constantly walks a tightrope between precision and confusion, where too much precision will undoubtedly confuse the beginning student.

Ray Weedon (rw) suggests replacing this with import java.lang.*, and a footnote saying this is optional.

Resizing windows (Page 75)

While the statement that the window can be resized is true, it is perhaps confusing to the novice users. Since the bounding box size checked by the balls is set by static final variables and not changed, altering the window size will not alter the behavior of the balls.

Inner Classes (Page 113)

Andrew Black found his students confused about the binding of the method repaint in the code on page 113, and wrote up a short web page to explain.

class Date (Page 269)

However, the typo on page 269 is really irrelevant, as the entire class as been deprecated in the move to Java 1.2.

Misc Links

• Ray Weedon from the Open Univ in the UK has a long list of dicussion points, many of which are longer than mere typos.

Grateful Acknowledgement

(wb)

Walter Beck, Assoc. Prof., Computer Science, University of Northern Iowa.

(ab)

Andrew Black, Professor and Chair, Department of Computer Science and Engineering, Oregon Graduate Institute

(nd)

Nam Dang, Millennium Pharmaceuticals, Inc.

(tg)

Thomas Gross, Computer Science, Carnege-Mellon University

(jh)

Jon Heggland, Forsvarets Forskningsinstitutt, Norway.

(mk)

Mattias Karlström, Student, Kungl Tekniska Högskolan (Royal Institute of Technology), Stokholm, Sweden.

(tl)

Thomas Larsson, Lecturer Mälardalens Högskola (Mälardalen University), Sweden.

(tor)

Prof. Tor Lønnestad, Department of informatics and mathematics, Telemark College, Norway

(mm)

Mark Morrissey, Director of Special Projects, the Oregon Graduate Institute, Department of Computer Science and Engineering

(Öp)

Örjan Petersson, Asnières-lès-Dijon, France

(es)

Eyal Shifroni, Center for Educational Technology, Israel.

(ns)

Neal Smith, Instructor, Department of Computer Science, Oregon State University

(ss)

Shoichi Shibata, Dr.Sci.: College of Engineering, Chubu Univ.

(jt)

John A. Trono, Associate Professor of Computer Science, St. Michael's College.

(rw)

Ray Weedon, Open University, UK.

Where to Write

Last Modified: