Execute Linux commands from Java

                                          Execute Linux commands from Java



Sometime you may get an requirement where you need to run Linux commands inside java program.
For ex: suppose you have to run some script file,so you need to run using sh command of Linux.

 /**  
  * @author Dixit  
  *  
  */  
 public class ExecuteLinuxCommands {  
      public static void main(String a[])  
      {  
           int commandExitCode=executeCmd("ls");  
      }  
      public static int executeCmd( final String command )  
        {  
            int exitCode=-1;  
         Process p = null;  
         InputStream inputstream = null;  
         InputStreamReader inputstreamreader = null;  
         BufferedReader bufferedreader = null;  
         StringBuilder sb = new StringBuilder();  
         try  
         {  
           System.out.println( "Executing : " + command );  
           p = Runtime.getRuntime().exec( command );  
           inputstream = p.getInputStream();  
           inputstreamreader = new InputStreamReader( inputstream );  
           bufferedreader = new BufferedReader( inputstreamreader );  
           String line;  
           while ( ( line = bufferedreader.readLine() ) != null )  
           {  
            sb.append( line );  
            sb.append( "\n" );  
           }  
           System.out.println( sb.toString() );  
           exitCode = p.waitFor();  
         }  
         catch ( Exception e )  
         {  
           // Swallow all exceptions  
           System.out.println( "Command execution failed"+e);  
         }  
         finally  
         {  
           try  
           {  
            if ( p != null ) p.destroy();  
            if ( inputstream != null ) inputstream.close();  
            if ( inputstreamreader != null ) inputstreamreader.close();  
            if ( bufferedreader != null ) bufferedreader.close();  
           }  
           catch ( IOException e )  
           {  
           }  
         }  
         return exitCode;  
        }  
 }  

Note:This program is suitable for Linux environment.You can run any Linux command and view the output.

Enjoy programming :)