java.io.IOException: error=2, No such file or directory in mac OSX

[Balkishore pandey]

Hi,

I am trying to run a node.js script from java. And the following is my source code:

public static void main(String[] args) throws IOException {
      
             String [] env=null;
             String[]callAndArgs= {"node","listport.js"};

             Process p = Runtime.getRuntime().exec(callAndArgs,env,
             new java.io.File("/Users/username/Desktop/serialport"));
             
             System.out.println("------<<<<<<");
             BufferedReader stdInput = new BufferedReader(new 
             InputStreamReader(p.getInputStream()));//getting the input

             BufferedReader stdError = new BufferedReader(new 
             InputStreamReader(p.getErrorStream()));//getting the error

             interface_name = stdInput.readLine();//reading the output
             System.out.println(interface_name);             
        
    }

In doing so, i get an error java.io.IOException: error=2, No such file or directory

What am I doing wrong here?

Any help?

[Ivan Jozsef Balazs]

My guess is that you want to run a script, which is not runnable alone, but only in conjunction with the shell executable.

The shell program could be bash or whatnot - I do not know mac OSX.

[Campbell Ritchie]

Have you any idea which file doesn’t exist?

I shall move this thread, because it is too difficult for “beginning”.

[Balkishore pandey]

Hi,

Thanks a ton for replying.

The file exists. When I type the same on terminal, the file executes.

[Ivan Jozsef Balazs]

What do you type in on the terminal in order to run it?

What is the file? A script or an executable? I maintain my first guess.

[Balkishore pandey]

Hi,

It is a script. A javascript file. Inorder to run it in terminal. I usually goto to the folder where the file exist and type

node listport.js

node is also set as environment variable.

Thanks for the help.

[Ivan Jozsef Balazs]

I see.

You could try "node" with its full path name.

[Balkishore pandey]

How should I do that by the way??

[Ivan Jozsef Balazs]

I assume "node" is a program picked by the command prompt. It must reside somewhere like /opt/where/ever/utils/node, so you can use the full path name.

Just a wild guess though.

Under Linux I'd use "type" or "which" to locate "node".

oracle@izsak:/tmp> type bash
bash is /bin/bash

oracle@izsak:/tmp> which bash
/bin/bash

[Balkishore pandey]

Hi,

Node resides in /usr/local/bin/node, but what will I do with it??

when I type

master1:~ kishore$ node /Users/kishore/Desktop/serialport/listport.js

on my terminal, the script runs.

So I decided to copy this file where my netbeans project folder resides, (i.e) my user directory and did something like:

String directory = System.getProperty("user.dir" + "/listport.js");
System.out.println(directory);

And got the output as null. So my concern is how can I store the path in a string along with the filename?

[Tony Docherty]

String directory = System.getProperty("user.dir" + "/listport.js"); 
System.out.println(directory);

That should be:

String directory = System.getProperty("user.dir") + "/listport.js"; 
System.out.println(directory);

[Ivan Jozsef Balazs]

Balkishore pandey wrote:Hi,
Node resides in /usr/local/bin/node, but what will I do with it??

Use "/usr/local/bin/node" instead of plain "node".

[Balkishore pandey]

Thanks a lot.

[Balkishore pandey]

Thanks a lot mate. Using "/usr/local/bin/node " solved the issue.

[Ben Alex Barreto]

I know this is probably just test code, but nonetheless, let me tell ya :P Adding a Throws declaration to the main method is terrible idea, because if it does throw an IO exception, it will be sent to the JVM itself, and you will never be able to handle it.