Thanks for clearing up... Bastiaan
On Mon, 30 Dec 2002 07:49:22 +1000 (E. Australia Standard Time), Ronald Bleckendorf wrote: > > Yes, Java is indeed different from JavaScript. > > java is also an operating system in its own right. However, there are onl > y a > few dozen Java PCs in the world at this time. Most of those are at Sun > Microsystems. Those machines run Java directly. Being fairly small compar > ed > with Windows, the whole OS is stored on ROM. Whenever the machine is turn > ed > on, there is no waiting time for the OS to load. > > Most of us don't have a Java machine, so we have to install a "Virtual > Machine" first. This virtual machine - or JVM - communicates between Java > and the operating system of the physical machine. JVMs are available for > practically any platform, hence the portability. > > Using a virtual machine introduces some problems, though: As really two > operating systems are used, with the VM to translate between the two, a > noticeable drop in performance can be experienced. > > Technically speaking, there is really no JVM for Windows. It is really a > DOS > application. That's true for the Sun JVM. I have a feeling the Microsoft > version may not work under DOS only systems. When installing the Sun > Microsystems Java Virtual Machine, the following should be added to the > autoexec.bat file: > > set classpath=c:\java\lib\classes.zip; > path=c:\java\bin > Java does NOT need Windows to run. The Sun Microsystem's JVM for DOS is a > DOS-based application. Even some Windows versions work in a DOS-only > environment. Having said that, I have to admit that later versions (highe > r > than 1.1) may not work correctly on DOS-only systems. Especially later > versions may be taylored to run on the newer, non-DOS based Windows (NT, > 2000 and XP). So, if you download a version, try to get an old one:-) The > DOS version 1.1 works fine here under DOS 6.22. All Java needs is DOS and > the correct Java JRE. > > Almost all Java programming is done in DOS text mode (even if Windows is > the > OS), and the code is compiled from the command prompt. The code is simila > r, > but not the same, as C++ code, so C programmers will find it easier to le > arn > There are really no practical GUI interfaces for programming in Java. > Everything, even graphics, have to be coded in a text editor of some kind > before compiling. Borland JBuilder (Windows needed) makes things easier, > but > is still only a better text editor. For easier graphical interfaces, Osbo > rne > and Lambert's "BreezyGUI" (no Windows needed) can be very helpful for > beginners. > > Even though Java is said to be the fastest growing language (probably > because of web applets), I can think of only two truly practical applicat > ion > which is "Corel Office for Java", which includes WordPerfect, QuattroPro > and a schduler. (Details: http://developer.novell > com/research/devnotes/1997/may/16/), and Lotus Kona, which includes > everything MS Office does. I was able to download a copy of Corel Office > for > Java a couple of years ago, but the site seems to have gone. If anyone is > interested, let me know. > > Sun Microsystems also developed a pure Java web browser called "HotJava", > which runs on any java platform below 1.2. Again, if the proper JVM is > installed, Windows is not necessary to run this browser. It can handle Ja > va > (of course!) and JavaScript as well. The browser can be downloaded from > http://java.sun.com/products/hotjava/3.0/ > > The Sun Microsystem DOS JVM is called JAVA-PC and can be downloaded from > http://java.sun.com/pr/1998/09/spotnews/sn980922.html. Just follow the li > nks > It may not work very well in systems below 486, though. > > I use the Java for DOS JRE 1.1 on an old 486DX66, 1MB RAM, 30MB HDD. This > allows me to connect the machine to the network and thus access the Inter > net > using the fully graphical HotJava browser. > > Another option could be to install RJ-DOS (if you can find it), which is > a > DOS platform which includes a JVM. > > Hope this helps. > > Dr. Ron > > -------Original Message------- > > From: [EMAIL PROTECTED] > Date: Sunday, 29 December 2002 05:55:55 AM > To: [EMAIL PROTECTED] > Subject: Re: now, DOS is JAVA > > We had a discussion on the List, some time ago, and if I recall > correctly JAVA is totaly different to java-script. > > Java-script is bad... not handled by Arachne > > Yes, it was mentioned that JAVA is running in every operating system... > is it an operating system itself? > > Who knows some more about JAVA? > > CU, Bastiaan > > > On Fri, 27 Dec 2002 21:01:30 +0000, Ariel Lachter wrote: > >> (sorry my bad english) >> Yesterday "the bad" are frames. >> Now "the bad" is java. >> I see in freebyte that make programs that run in any >> operating system with virtual java machine. >> Maybe is time to change, d.o.s ==> java. >> Who take the bull by the horn's? > >> -- Arachne V1.70;rev.3, NON-COMMERCIAL copy, http://arachne.cz/ > > . > [Attached file: 5210S402.HTM]
