Learning Wireless Java
by Qusay Mahmoud

The unconfirmed error reports are from readers. They have not yet been 
approved or disproved by the author or editor and represent solely the
opinion of the reader.

Here's a key to the markup:
        [page-number]: serious technical mistake
        {page-number}: minor technical mistake
        <page-number>: important language/formatting problem
        (page-number): language change or minor formatting problem
        ?page-number?: reader question or request for clarification

This page was updated April 19, 2007.


UNCONFIRMED Error reports from readers:


[10] environment variables on second half of the page;
With the current version of the J2ME Wireless Toolkit, The MIDPAPI environment 
variable should be set to:

'%J2MEWTK_HOME%\lib\midpapi21.jar;%J2MEWTK_HOME%\lib\cldcapi10.jar'

instead of:

'%J2MEWTK_HOME%\lib\midpapi.zip'



{34}  Table at the bottom;
The value of the first column of the first row should read 'microedition.locale' 
not 'microedition.local,' according to the MIDP specification.


{34}  last paragraph;
"The MIDP defines two additional property values ..." - This is misguiding as the
property "microedition.profiles" is already defined by the CLDC, the only difference
being, that this property defaults to null with the CLDC standard and now it must
contain at least "MIDP-1.0".

"... (in addition to the eight in the previous Chapter)" - There were only four.


{35}  Figure 3-1;
The text is not in synch with the Figure. Moreover, the Figure contains an error. 
The arrow that goes from the destroyed state to the Active state should go the 
other way according to the text and to the logics.

The same goes for Figure 4-1 on page 43.


{35}  1st paragraph;
'microedition.local' should read 'microedition.locale,' according to the MIDP
specification.


(64)  last paragraph;
In the last paragraph, the first method (of the 2 shown) should be 'public void
boolean isColor()' instead of 'public void boolean inColor()'


{66}  1st code excerpt;
The first line of the code should be
Display display = Display.getDisplay(this);
Notice the this as argument to the getDisplay() method which is missing in the book.


{67} There is a problem with the TextField constraints. There is no such
thing as TextField.NUMBER (also on page 86) 

The correct constraint for a TextField is TextField.NUMERIC


{70}  1st paragraph;
The code snippet of the first paragraph is not a code snippet but the method syntax.


{71}  1st code excerpt;
The code and the Figure 5-7 and not in synch.
The code says that the Alert's title should be "Error" and "Network Error" is 
displayed instead. 
According to the code, the Alert's text should be "Network Error. Please try 
again later" and we have instead on the Figure "No Connection. Please try again 
later".


{71}  1st paragraph;
In the code snippet, the variable for the alert is called 'modalAert' but is used
afterwards as 'modalAlert'.


{73}  1st code excerpt;
The code and the Figure 5-8 and 5-9 are not in synch.
The code says that the List's title should be "Edit" but "Message" is displayed 
instead...
Moreover, the third item in the List ("Delete") is not what the code says it 
should be ("delete"). Notice the lowercase "d".


{73}  2nd code snippet;
the append() method for the menu object (which is of type List) should take 2
parameters as in:

public int append(String stringPart, Image imagePart)


{86} There is a problem with the TextField constraints.  There is no such
thing as TextField.NUMBER

The correct constraint for a TextField is TextField.NUMERIC


{91}  last code snippet;
The constants used in the code snippet should be of the class Font. So the code
should be 'Font font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN,
Font.SIZE_Medium);'


[124]  code;
When compiling the code from Example 7-2 the following error occurs:

c:\J2mewtk\apps\CgiGetTest\src\InvokeCgiMidlet1.java:47: cannot resolve symbol
symbol  : method writeByte  (byte)
location: class java.io.OutputStream
				os.writeByte(postmsg[i]);
                                  ^

Cause: The method writeByte is not defined in OutputStream, but in DataOutputStream.

Workaround:
...
DataOutputStream os = null;
...
os = c.openDataOutputStream();
...

Now everything should work fine.


{124}  wrong URL;
The URL
"http://www.javacourses.com/cgibin/getgrade.cgi?idnum=182016"
cannot be found, because it is mistyped (missing hyphen in "cgi-bin"). THe correct
URL is
"http://www.javacourses.com/cgi-bin/getgrade.cgi?idnum=182016".


{200}  class overview java.util.Hashtable;
Hashtable is shown in pseudocode as "interface", should be "class".