Java Showing Error NoSuchFileException

Question

I am trying to develop a java application for cruise control system. But I am having a problem in no such file exception. As I am little bit new in java coding. I am not sure why this problem is occurring. My Code is-

 public static void main(String[] commandLineArgs) throws IOException {
    Path input_path = Paths.get(commandLineArgs[0]);
    List<InputState> input_states = StateInput.input_states_from_file(input_path);
    Timer timer = new Timer(new CruiseControlSystem());
    List<OutputState> output_states = timer.pulse_from_input(input_states);
    for (OutputState s : output_states){
        System.out.println(s.format());
    }
}

And the Error I found is -

Exception in thread "main" java.nio.file.NoSuchFileException: commandLineArgs[0]
at sun.nio.fs.WindowsException.translateToIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsFileSystemProvider.newByteChannel(Unknown Source)
at java.nio.file.Files.newByteChannel(Unknown Source)
at java.nio.file.Files.newByteChannel(Unknown Source)
at java.nio.file.spi.FileSystemProvider.newInputStream(Unknown Source)
at java.nio.file.Files.newInputStream(Unknown Source)
at java.nio.file.Files.newBufferedReader(Unknown Source)
at java.nio.file.Files.readAllLines(Unknown Source)
at StateInput.input_states_from_file(StateInput.java:31)
at CommandLine.main(CommandLine.java:23)

My Main Method is -

public static void main(String[] commandLineArgs) throws IOException {
    Path input_path = Paths.get(commandLineArgs[0]);
    List<InputState> input_states = StateInput.input_states_from_file(input_path);
    Timer timer = new Timer(new CruiseControlSystem());
    List<OutputState> output_states = timer.pulse_from_input(input_states);
    for (OutputState s : output_states){
        System.out.println(s.format());
     }
 }

StvnBrkdll · Answer 1 · 2016-10-14T23:54:15.360

0

In the Program Arguments textbox you currently have "commandLineArgs[0]". You need to change "commandLineArgs[0]" to the path to your file containing the input states. Something like "/data/input-states".

edited Oct 14 '16 at 23:54

answered Oct 14 '16 at 23:25

StvnBrkdll

3,924
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score 0 · Answer 2 · answered Oct 15 '16 at 00:31

0

My main method is:

Path input_path = Paths.get(commandLineArgs[0]);

No it isn't. You are passing "commandLineArgs[0]" as the argument. You mean commandLineArgs[0], without the quotation marks.

answered Oct 15 '16 at 00:31

user207421

305,947
44
307
483

score -1 · Answer 3 · answered Oct 14 '16 at 22:16

-1

You are not passing any arguments to main method while running the program.

Can you also add how are you running this.

answered Oct 14 '16 at 22:16

kushagra mittal

343
5
17

@kushagra_mittal I hav modified my question and gave main method – ktina51 Oct 14 '16 at 22:21
I am trying to run this with eclipse – ktina51 Oct 14 '16 at 22:23
1

You have to pass a single argument from eclipse. Go to Run Configurations. Look for tab Arguments and pass a single argument in Program Arguments. This will resolve your issue. If you want i can post a ScreenShot for same – kushagra mittal Oct 14 '16 at 22:25
I am a bit in java. Can you please explain me how can I do that – ktina51 Oct 14 '16 at 22:26
Right Click on you java class, there will be a tab Run As when you expand that you will see run configuration. Open that and set the argument. Let me post a ScreenShot so that you will be more clear. – kushagra mittal Oct 14 '16 at 22:28
https://developers.google.com/eclipse/images/runConfigurationToolbarList.png https://www.eclipse.org/virgo/documentation/virgo-documentation-3.5.0.RELEASE/docs/virgo-user-guide/htmlsingle/images/director_args.png See these SS for help – kushagra mittal Oct 14 '16 at 22:30
Instead commandLineArgs[0] pass a path like "/home/ubuntu/file.txt" - Your input Path. – kushagra mittal Oct 14 '16 at 22:35
Yes, path to that file. – kushagra mittal Oct 14 '16 at 22:39
I am trying to chaange the argument but still it is not working – ktina51 Oct 14 '16 at 22:56
Is file is present at that location? Are you still getting same exception? – kushagra mittal Oct 14 '16 at 23:07

Java Showing Error NoSuchFileException

3 Answers3