3/19/2019 0 Comments Java Coding Programs For MacFor Java versions 6 and below, Apple supplies their own version of Java. For Mac OS X 10.6 and below, use the Software Update feature (available on the Apple menu) to check that you have the most up-to-date version of Java 6 for your Mac. For issues related to Apple Java 6 on Mac, contact Apple Support. I know very little about java programming on the mac, but depending on what type of programming you will be doing, the mac should work fine. There are actually 3rd party java IDEs available for osx but the dev tools includes everything you need. ![]() Code: tag is. Thats way I ask the question.[/QUOTE] You already used it, so I guess you know what it is now. Asking the question doesn't indicate you don't understand what the program is supposed to do. [quote='crtvmac, post: 9447675']I ran the program using BlueJ complier. Is there a better way?[/QUOTE] That is probably why there are no arguments. [quote='crtvmac, post: 9447665']I show you the program. Thats is as far as I understand the program. Thats is way I displayed the program and ask for help. This could be fairly quickly or very long, depending on your system and USB drive. (You won't visibly see your password typing, but it's happening—believe me.) Now just wait. After you get it in there, just hit the Enter key. How to prepare a flash drive for windows installation on mac. Type in your admin password to continue and the Enter again. Any other information about this program, I don't understand.[/QUOTE] [quote='crtvmac, post: 9447713']All I know about the program is what you see. Blink[/QUOTE] Ok, did you copy it from somewhere? Are you trying to understand a random piece of code? Why are you running it if you don't know/care what it does?:confused: Or are you being mysterious?;). Click to expand.The BlueJ website tells you how to pass command-line args to your main class: I recommend copying and pasting the text from the web-page. It appears to be custom-made for your CommandLine class. The above link came from BlueJ FAQs: Which I found by typing bluej command line into google. The simple answer to what's wrong with your program is it blindly assumes the array it receives has 3 elements. This may not always be true, since the array passed to main() represents command-line parameters entered on the command-line. If any method receives an array parameter and doesn't already know the length of the array, it should be written to use the actual length of the received array. This is because the receiver (i.e. The method that was called) doesn't get to choose the length. The sender (i.e. The point where the target method was called) is the one who chooses what the receiver receives. If you entered that program from a book or tutorial, it should have told you how to run it. Since you haven't said what book or tutorial you're working from, if any, no one can offer you better advice. You have to tell us what you're working from. What is automater software for mac. The program didn't write itself. Crtvmac: You are assuming we're trying to give you a hard time, etc. What we're really trying to do is shed light on why you got the behavior you got. Essentially, this program: prints 'args.length = ', then displays the number of command line arguments passed to the program. If none are passed, this will display 0. Next, the program prints 'args[0] = ', then assumes there is at least one arguments, and prints the first argument. Next, the program prints 'args[1] = ', then assumes there are at least two arguments, and prints the second argument. Next, the program prints 'args[2] = ', then assumes there are at least three arguments, and prints the third argument. If you don't pass any arguments, then the assumptions for everything but the first print are incorrect, so you'll get an error (in this case, an exception, a special sort of error) like the one you experienced. This (found by googling 'BlueJ arguments') explains how to set the arguments to main (normally passed on the command line): -Lee Edit: Also, one should never assume any non-primitive (array,object, etc.) is non-null. I don't know if there are platforms where args passed to main are null instead of length 0, but in general, checking things for null before using.length is best. Download and install Eclipse, and you're good to go. Apple provides its own version of Java, so make sure it's up-to-date. Eclipse is an. It has many features, but the ones that are relevant for you at this stage is: • The source code editor • With syntax highlighting, colors and other visual cues • Easy cross-referencing to the documentation to facilitate learning • Compiler • Run the code with one click • Get notified of errors/mistakes as you go As you gain more experience, you'll start to appreciate the rest of its rich set of features.
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