I tried to change the syntax of the add modules statement, added and removed equal signs, removed spaces, however the VM was still unable to recognise the imported modules. However, when I tried to modify the runtime VM options in the project properties to include the modules ntrols and javafx.fxml and ran the project, I got the error:Įrror occurred during initialization of boot layer I followed the instructions for running a non-modular project from IDE, and I was able to successfully compile the program without any errors. Thread.sleep((r.Hello, I'm trying to run this JavaFX application using JDK 11 and OpenJFX 11.0.2 in NetBeans on linux. ("Thread " + me + " read " + count++) // count may be a problem in your semaphore code. if the count display stops without the final results, there a count for the display statement each thread prints While(! keepgoing) /* Empty statement */ this loop holds the worker threads until the main thread has started Random r = new Random(System.nanoTime()) use to generate a sleep between readng from the input file
JGRASP RUN ARGUMENTS CODE
Remember, when a thread acquires the semaphore, it must eventually release it for correct behavior, no matter what path through the code is taken. Your task for this part of the assignment is to identify the critical section of the run method, define and initialize a binary semaphore, and use the semaphore acquire() and release() methods to protect the critical section. In fact, you may find that the program occasionally throws an ArrayOutOfBoundsException on the append to one of the logs. When this program is run as is (unless you run it with only one thread), you’ll note that the display of the main log is nothing like the original file. Note that in any of the situations for end the thread’s reading of the file (end of file, IOException, or InterruptedException), the behavior is the same: make all threads stop.Īfter the Thread.sleep() method returns, the character that was read is added to the end of the main log (in the variable mainLog) and to the end of the thread private log (in the variable myLog).
Since the Thread.sleep() can throw an Interrupted Exception, this is alsoĬaught. After the call to the read() method, Thread.sleep() is called to put in a random delay. The read() method also can throw an IOException, which is caught. The read() returns an integer value that either represents the character read from the file, or is -1 to represent the end of the file. The input file is a Java FileReader object, which supports the read() method. The run method is shown on the next page. The main method then creates a private log (as a StringBuilder class object) for each thread, creates a runnable object (giving the private log and index as arguments to the constructor), and then starts the thread. The main method verifies that the command line arguments exist and are valid (the file exists and can be opened, and the number of threads is less than or equal to 15). This will open a textfield above the edit area in which you can type the command line arguments. To run the program in Jgrasp with command line argument, go the the Build menu and click Run Arguments.
Java FileThreads InputFile.txt where InputFile.txt is the input file the threads read (it could be called anything, but I supply a file called InputFile.txt)Īnd is the number of threads to start (must be less than 15). The program uses command line arguments as so: I suggest that you use Jgrasp to implement your project. I provide a starter program for you to work from for this part of the assignment. However, the file is read by some number of threads as indicated by the programs command line arguments. Part 1: In this part of the project, you will add synchronization (using semaphores) to a program that reads and displays a file. CS554AH2 Operating Systems Programming Assignment
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