Run commands using java

[pjerald]

Dear All

I have written a simple program using thread. My aim is to run a command. Please lead me how to do ? I am just posting my start code here.

 
package com.pjerald.robot;
 
import java.net.*;
import java.io.*;
 
public class RunCmd extends Thread
{
public static void main(String[] args)
{
//RunCmd rc = new RunCmd("ls -ltr");
RunCmd rc = new RunCmd("mkdir -p test1/test2/test3");
rc.start();
}
    String cmd = null;
    RunCmd(String cmd) {
        this.cmd = cmd;
    }
    public void run() {
        if(cmd != null)
        {
            try{
                Thread t = new Thread(cmd);
                t.start();
                int count = 0;
                do
                {
                    if(count == 100)
                    {
                        System.out.println(" TIME OUT for Thread ::"+t.getName());
                        t.destroy();
                    }
                    t.sleep(500);
                    System.out.println("Thread ::"+t.getName()+" running");
                    count = count+1;
                }
                while(t.isAlive());
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
        }
    }
}
 
 
 

[JosAH]

Your curly brackets are goofy and read the API documentation of the Thread
class because line 22 doesn't do what you assume it does.

kind regards,

Jos

[pjerald]

Thanks for the reply.

Your curly brackets are goofy and read the API documentation of the Thread
class because line 22 doesn't do what you assume it does.

Sorry for code indentation.

I read API documentation and understand that my constructor is equivalent to

Thread(null, null, name);
which is Thread(ThreadGroup group, Runnable target, String name)

I don know how to proceed with this. give an idea please.
i will try and get back to you.

[JosAH]

Thanks for the reply.



Sorry for code indentation.

I read API documentation and understand that my constructor is equivalent to

Thread(null, null, name);
which is Thread(ThreadGroup group, Runnable target, String name)

I don know how to proceed with this. give an idea please.
i will try and get back to you.

Well, it's not just the indentation, the structure of your methods is just plain wrong
(see the position of the curly brackets).

If you want to run an external program have a look at the Runtime.exec() methods.
Also read the API documentation for the Thread class: you can't destroy() a Thread
safely and the method is therefore deprecated.

kind regards,

Jos