TweetFollow Us on Twitter

Aug 96 Top 10
Volume Number:12
Issue Number:8
Column Tag:Symantec Top Ten

Symantec Top 10

By Rick Hartmann

Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.

With all the excitement about Java, and the recent release of Symantec Café for Macintosh, we thought we would devote this issue of the Symantec Top Ten to Java.

(As this article goes to press there are updates to Café and Sun’s Java Development Kit for Macintosh soon to be released. Due to the rapid development cycle of these Java products, there will likely be numerous changes and bug fixes during this phase. Please read the release notes for the latest version of Café to determine if a specific problem has been resolved, and check the Café Web site, http://cafe.symantec.com, for the latest news regarding Java and Café.)

Q: Sometimes when I double-click on a C++ project, I get the Café Version of the Project Manager. Why?

A: The standalone Café Project Manager will soon be integrated into the Symantec Project Manager along with C++, C, and Pascal. Therefore the creator type was left the same as the SPM. This may cause some confusion until then, so if you have both Symantec Project Manager for C++ and Café, you should get in the habit of dragging project files directly to the Café icon or an alias on the desktop with a name that identifies it as the Café Project Manager.

Q: When I try to use java.net.ServerSocket or java.net.Socket, etc., I am getting a Java runtime error:

 Can't get watchdog proc

What is wrong?

A: The Macintosh Java virtual machine does not correctly handle the java.net package as of this writing. We expect an update from Sun that will correct this well before you read this. There is currently no workaround.

Q: My applet’s mouseMove() function is getting called continuously, even when the mouse does not move. Why?

A: This is an AppletViewer problem. Try dragging the HTML file from your applet project onto a Java-enabled browser instead.

Q: My applet behaves differently depending on whether I run it in the AppletViewer or in Netscape. Why?

A: There are a good number of quirks with the AppletViewer right now. Both products are beta. As these products mature and reach their final versions, we expect their behavior to be more consistent.

Q: Choosing the default font in Café Studio seems to cause a runtime error:

java.lang.NullPointerException
at java.awt.Font.<init>(Font.java)
at studio.init(studio.java:101)
at sun.applet.AppletPanel.run(AppletPanel.java)
at java.lang.Thread.run(Thread.java)

How do I fix this?

A: Studio generates the following:

 myItemfont = new Font(null, Font.PLAIN, 9); 

The first parameter must be a String; hence the exception. In the next release this will be changed to:

 myItemfont = new Font("", Font.PLAIN, 9); 

Q: Why am I getting this compile error?

Error: File Foo.class does not contain Foo as expected, but java.Apackage.Foo. Please remove the file.

A: You forgot to import java.apackage.foo.

Q: I renamed my Java application’s HelloWorld.java source file to foo.java, and also changed public class HelloWorld to public class foo; but now when I choose Run from the Project Manager, I get:


Could not complete the last command because the file was not found... -43


or:

Could not complete the last command because the AppleEvent was not handled... -1708

What did I forget?

A: Under the Project menu, in Options: Project Type, you must set the “main() class” popup to the name of your class that contains the main() method.

Q: When I run my Java application, I get this error in the stderr window:

java.lang.IllegalAccessException: ClassName
at sun.applet.AppletPanel.run(AppletPanel.java)
at java.lang.Thread.run(Thread.java)
java.lang.NullPointerException
at sun.applet.AppletPanel.run(AppletPanel.java)
at java.lang.Thread.run(Thread.java)

The stdout window contains this message:

load: ClassName is not public or has no public constructor.

What is wrong?

A: Your project type was set to be an applet instead of an application. Go to the Project menu and choose Options. Click on the Project Type. Set the Program Type radio button to Application and make sure the “main() class” popup menu is set to your class name that contains your main() method.

Q: When I try to run the StdinTest program from the Introduction to Java demos, it hangs my system. Why?

A: The current version of the Macintosh Java virtual machine is not doing standard (keyboard) input correctly. We expect Sun to correct this soon. It will probably be functional by the time you read this. Check our Web page for the latest information on these issues.

Q: How do I save the stdout and stderr windows to a file? Can I redirect stdout and stderr to files, like I can with C and C++?

A: Yes to both questions. Launch the AppletViewer. From the Apple menu select the Java Runtime menu. It contains menu items for both redirection of stdout and stderr as well as a Save Text Window item for the frontmost text window.

Q: I drag the applet class file on the AppletViewer and I get an error. How do I run applets?

A: Applets are designed to be run within the context of a Web browser that supports the Java virtual machine. You must first create a Web page with the proper HTML tags for your applet. At a minimum, for an applet to run, you’ll need:

 <applet code = myAppletName width=300 height=400>
 </applet>

You can then drag the HTML file on the AppletViewer or a Java-enabled browser.

Thanks to Andy McFarland, Kevin Quah, Scott Morison, Noah Lieberman, Michael Hopkins, Levi Brown, Glenn Austin, Steve Howard, Craig Conner, Chris Prinos, Peter Fry, and Mark Baldwin for their contributions to this article.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

FotoMagico 5.6.12 - Powerful slideshow c...
FotoMagico lets you create professional slideshows from your photos and music with just a few, simple mouse clicks. It sports a very clean and intuitive yet powerful user interface. High image... Read more
OmniGraffle Pro 7.12.1 - Create diagrams...
OmniGraffle Pro helps you draw beautiful diagrams, family trees, flow charts, org charts, layouts, and (mathematically speaking) any other directed or non-directed graphs. We've had people use... Read more
beaTunes 5.2.1 - Organize your music col...
beaTunes is a full-featured music player and organizational tool for music collections. How well organized is your music library? Are your artists always spelled the same way? Any R.E.M. vs REM?... Read more
HandBrake 1.3.0 - Versatile video encode...
HandBrake is a tool for converting video from nearly any format to a selection of modern, widely supported codecs. Features Supported Sources VIDEO_TS folder, DVD image or real DVD (unencrypted... Read more
Macs Fan Control 1.5.1.6 - Monitor and c...
Macs Fan Control allows you to monitor and control almost any aspect of your computer's fans, with support for controlling fan speed, temperature sensors pane, menu-bar icon, and autostart with... Read more
TunnelBear 3.9.3 - Subscription-based pr...
TunnelBear is a subscription-based virtual private network (VPN) service and companion app, enabling you to browse the internet privately and securely. Features Browse privately - Secure your data... Read more
calibre 4.3.0 - Complete e-book library...
Calibre is a complete e-book library manager. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Let Calibre be your multi-tasking digital librarian... Read more
Lyn 1.13 - Lightweight image browser and...
Lyn is a fast, lightweight image browser and viewer designed for photographers, graphic artists, and Web designers. Featuring an extremely versatile and aesthetically pleasing interface, it delivers... Read more
Visual Studio Code 1.40.0 - Cross-platfo...
Visual Studio Code provides developers with a new choice of developer tool that combines the simplicity and streamlined experience of a code editor with the best of what developers need for their... Read more
OmniGraffle 7.12.1 - Create diagrams, fl...
OmniGraffle helps you draw beautiful diagrams, family trees, flow charts, org charts, layouts, and (mathematically speaking) any other directed or non-directed graphs. We've had people use Graffle to... Read more

Latest Forum Discussions

See All

The House of Da Vinci 2 gets a new gamep...
The House of Da Vinci launched all the way back in 2017. Now, developer Blue Brain Games is gearing up to deliver a second dose of The Room-inspired puzzling. Some fresh details have now emerged, alongside the game's first official trailer. [Read... | Read more »
Shoot 'em up action awaits in Battl...
BattleBrew Productions has just introduced another entry into its award winning, barrelpunk inspired, BattleSky Brigade series. Whilst its previous title BattleSky Brigade TapTap provided fans with idle town building gameplay, this time the... | Read more »
Arcade classic R-Type Dimensions EX blas...
If you're a long time fan of shmups and have been looking for something to play lately, Tozai Games may have just released an ideal game for you on iOS. R-Type Dimensions EX brings the first R-Type and its sequel to iOS devices. [Read more] | Read more »
Intense VR first-person shooter Colonicl...
Our latest VR obsession is Colonicle, an intense VR FPS, recently released on Oculus and Google Play, courtesy of From Fake Eyes and Goboogie Games. It's a pulse-pounding multiplayer shooter which should appeal to genre fanatics and newcomers alike... | Read more »
PUBG Mobile's incoming update bring...
PUGB Mobile's newest Royale Pass season they're calling Fury of the Wasteland arrives tomorrow and with it comes a fair chunk of new content to the game. We'll be seeing a new map, weapon and even a companion system. [Read more] | Read more »
PSA: Download Bastion for free, but wait...
There hasn’t been much news from Supergiant Games on mobile lately regarding new games, but there’s something going on with their first game. Bastion released on the App Store in 2012, and back then it was published by Warner Bros. This Warner... | Read more »
Apple Arcade: Ranked - 51+ [Updated 11.5...
This is Part 2 of our Apple Arcade Ranking list. To see part 1, go here. 51. Patterned [Read more] | Read more »
NABOKI is a blissful puzzler from acclai...
Acclaimed developer Rainbow Train's latest game, NABOKI, is set to launch for iOS, Android, and Steam on November 13th. It's a blissful puzzler all about taking levels apart in interesting, inventive ways. [Read more] | Read more »
A Case of Distrust is a narrative-driven...
A Case of Distrust a narrative-focused mystery game that's set in the roaring 20s. In it, you play as a detective with one of the most private eye sounding names ever – Phyllis Cadence Malone. You'll follow her journey in San Francisco as she... | Read more »
Brown Dust’s October update offers playe...
October is turning out to be a productive month for the Neowiz team, and a fantastic month to be a Brown Dust player. First, there was a crossover event with the popular manga That Time I Got Reincarnated as a Slime. Then, there was the addition of... | Read more »

Price Scanner via MacPrices.net

Score a 37% discount on Apple Smart Keyboards...
Amazon has Apple Smart Keyboards for current-generation 10″ iPad Airs and previous-generation 10″ iPad Pros on sale today for $99.99 shipped. That’s a 37% discount over Apple’s regular MSRP of $159... Read more
Apple has refurbished 2019 13″ 1.4GHz MacBook...
Apple has a full line of Certified Refurbished 2019 13″ 1.4GHz 4-Core Touch Bar MacBook Pros available starting at $1099 and up to $230 off MSRP. Apple’s one-year warranty is included, shipping is... Read more
2019 13″ 1.4GHz 4-Core MacBook Pros on sale f...
Amazon has new 2019 13″ 1.4GHz 4-Core Touch Bar MacBook Pros on sale for $150-$200 off Apple’s MSRP. These are the same MacBook Pros sold by Apple in its retail and online stores: – 2019 13″ 1.4GHz/... Read more
11″ 64GB Gray WiFi iPad Pro on sale for $674,...
Amazon has the 11″ 64GB Gray WiFi iPad Pro on sale today for $674 shipped. Their price is $125 off MSRP for this iPad, and it’s the lowest price available for the 64GB model from any Apple reseller. Read more
2019 15″ MacBook Pros available for up to $42...
Apple has a full line of 2019 15″ 6-Core and 8-Core Touch Bar MacBook Pros, Certified Refurbished, available for up to $420 off the cost of new models. Each model features a new outer case, shipping... Read more
2019 15″ MacBook Pros on sale this week for $...
Apple resellers B&H Photo and Amazon are offering the new 2019 15″ MacBook Pros for up to $300 off Apple’s MSRP including free shipping. These are the same MacBook Pros sold by Apple in its... Read more
Sunday Sale: AirPods with Wireless Charging C...
B&H Photo has Apple AirPods with Wireless Charging Case on sale for $159.99 through 11:59pm ET on November 11th. Their price is $40 off Apple’s MSRP, and it’s the lowest price available for these... Read more
Details of Sams Club November 9th one day App...
Through midnight Saturday night (November 9th), Sams Club online has several Apple products on sale as part of their One Day sales event. Choose free shipping or free local store pickup (if available... Read more
Sprint is offering the 64GB Apple iPhone 11 f...
Sprint has the new 64GB iPhone 11 available for $15 per month for new lines. That’s about 50% off their standard monthly lease of $29.17. Over is valid until November 24, 2019. The fine print: “Lease... Read more
New Sprint November iPhone deal: Lease one iP...
Switch to Sprint and purchase an Apple iPhone 11, 11 Pro, or 11 Pro Max, and get a second 64GB iPhone 11 for free. Requires 2 new lines or 1 upgrade-eligible line and 1 new line. Offer is valid from... Read more

Jobs Board

*Apple* Mobility Pro - Best Buy (United Stat...
**746087BR** **Job Title:** Apple Mobility Pro **Job Category:** Store Associates **Store NUmber or Department:** 000319-Harlem & Irving-Store **Job Description:** Read more
Best Buy *Apple* Computing Master - Best Bu...
**743392BR** **Job Title:** Best Buy Apple Computing Master **Job Category:** Store Associates **Store NUmber or Department:** 001171-Southglenn-Store **Job Read more
Best Buy *Apple* Computing Master - Best Bu...
**746015BR** **Job Title:** Best Buy Apple Computing Master **Job Category:** Sales **Store NUmber or Department:** 000372-Federal Way-Store **Job Description:** Read more
*Apple* Mobility Pro - Best Buy (United Stat...
**744658BR** **Job Title:** Apple Mobility Pro **Job Category:** Store Associates **Store NUmber or Department:** 000586-South Hills-Store **Job Description:** At Read more
Best Buy *Apple* Computing Master - Best Bu...
**741552BR** **Job Title:** Best Buy Apple Computing Master **Job Category:** Sales **Store NUmber or Department:** 000277-Metcalf-Store **Job Description:** **What Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.