Java Shell Command runCommand(String command, String args, String file)

Description

run Command

License

Open Source License

Declaration

private static boolean runCommand(String command, String args, String file) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.IOException;

import java.util.ArrayList;
import java.util.List;

public class Main {
    private static boolean runCommand(String command, String args, String file) {

        logOut("Trying to exec:\n   cmd = " + command + "\n   args = " + args + "\n   %s = " + file);

        String[] parts = prepareCommand(command, args, file);

        try {/*from  w  w w  . ja v a2 s. c  om*/
            Process p = Runtime.getRuntime().exec(parts);
            if (p == null)
                return false;

            try {
                int retval = p.exitValue();
                if (retval == 0) {
                    logErr("Process ended immediately.");
                    return false;
                } else {
                    logErr("Process crashed.");
                    return false;
                }
            } catch (IllegalThreadStateException itse) {
                logErr("Process is running.");
                return true;
            }
        } catch (IOException e) {
            logErr("Error running command.", e);
            return false;
        }
    }

    private static void logOut(String msg) {
        System.out.println(msg);
    }

    private static String[] prepareCommand(String command, String args, String file) {

        List<String> parts = new ArrayList<>();
        parts.add(command);

        if (args != null) {
            for (String s : args.split(" ")) {
                s = String.format(s, file); // put in the filename thing

                parts.add(s.trim());
            }
        }

        return parts.toArray(new String[parts.size()]);
    }

    private static void logErr(String msg, Throwable t) {
        System.err.println(msg);
        t.printStackTrace();
    }

    private static void logErr(String msg) {
        System.err.println(msg);
    }
}

Related

1. runCommand(final ProcessBuilder command)
2. runCommand(String cmd)
3. runCommand(String cmd)
4. runCommand(String command)
5. runCommand(String command)
6. runCommand(String command[])
7. runCommand(String program, ArrayList args)
8. runCommand(String s)
9. runCommand(String[] args)