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Join Date: Jun 2005
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Newbie Poster
i would like to put the command Dos into java program. how i using the java to perform command function.
for example, when we type ipconfig this command into command prompt, it will display my pc's ip right. so how i use java program when a user run my program it will perform that function.
another question is when we write the java program right, the java interpreter will created one file called *.class right. but i need to make this can run in each pc even though that pc is no install java. like the exe file can run in anyway just a double click it and the program will run.
thanks for help
for example, when we type ipconfig this command into command prompt, it will display my pc's ip right. so how i use java program when a user run my program it will perform that function.
another question is when we write the java program right, the java interpreter will created one file called *.class right. but i need to make this can run in each pc even though that pc is no install java. like the exe file can run in anyway just a double click it and the program will run.
thanks for help
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Join Date: Jun 2004
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Maybe this will work:
Process p = Runtime.Runtime().exec("ipconfig");
Process p = Runtime.Runtime().exec("ipconfig");
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Join Date: Jun 2005
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Newbie Poster
can u write the whole program for me because i just copy this syntax, it cant work. maybe i should add any package?
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Join Date: Mar 2004
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Master Poster
Here's code for the lazy man. Just change the host name to your computer name, because I'm not doing that for you too. If you use "localhost", it'll just return the local loopback IP.
import java.net.*;
class NetJunk
{
public static void main () throws UnknownHostException
{
String host = "Newton";
InetAddress ia = InetAddress.getByName(host);
System.out.println ("IP Address = " + ia.getHostAddress());
}
} •
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Join Date: Jun 2005
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Newbie Poster
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Originally Posted by Phaelax
Here's code for the lazy man. Just change the host name to your computer name, because I'm not doing that for you too. If you use "localhost", it'll just return the local loopback IP.
import java.net.*; class NetJunk { public static void main () throws UnknownHostException { String host = "Newton"; InetAddress ia = InetAddress.getByName(host); System.out.println ("IP Address = " + ia.getHostAddress()); } }
are you say i'm a lazy man!!!
well, fine but this program just solve that particular problem. what i need is i want use all the command's function apply into java program. IP is an example. let say i can use command prompt to shutdown my computer ( or even restart, logoff etc) just type shutdown in the command prompt. so shutdown this word is the one of the Dos command. now i would like to write a java program to control those command. What is the code for java can support this? What is the syntax?
is ok if you have no idea, never mind
anyway thanks you
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Join Date: Oct 2004
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Posting Whiz in Training
Just because I feel like helping:
Compile these two classes, then call
Replace ipconfig with whatever command you want to execute.
//CommandLine.java
import java.util.*;
import java.io.*;
public abstract class CommandLine
{
public static void exec(String cmd) throws Exception
{
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(cmd.toString());
StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR");
StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT");
errorGobbler.start();
outputGobbler.start();
}
public static void exec(String cmd, OutputStream output) throws Exception
{
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(cmd.toString());
StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR", output);
StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT", output);
errorGobbler.start();
outputGobbler.start();
}
}//StreamGobbler.java
import java.util.*;
import java.io.*;
class StreamGobbler extends Thread
{
InputStream is;
String type;
OutputStream os;
StreamGobbler(InputStream is, String type)
{
this(is, type, null);
}
StreamGobbler(InputStream is, String type, OutputStream redirect)
{
this.is = is;
this.type = type;
this.os = redirect;
}
public void run()
{
try
{
PrintWriter pw = null;
if (os != null)
pw = new PrintWriter(os);
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line=null;
while ( (line = br.readLine()) != null)
{
if (pw != null)
pw.println(line);
System.out.println(line);
}
if (pw != null)
pw.flush();
} catch (IOException ioe)
{
ioe.printStackTrace();
}
}
}CommandLine.exec("ipconfig"); •
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Junior Poster in Training
Gotta love people who want help taking an os independent programming language to make a program that is usable in windows only.
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Join Date: Oct 2004
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Posting Whiz in Training
It's not Windows-only, you could use System.getProperty("os.name") and a switch block to come up with something equivalent for each OS.
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Junior Poster in Training
Sorry mmiikkee i wasn't refering to your code, which looked nice btw, but i was refering to the name of the thread "Put the DOS commands into a java program". And yes piggy backing off shell or dos commands are handy in some situations.
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