Executing external application from Java

package net.xngo.tutorial.java.io;
 
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
 
public class CmdExecution
{
 
  public static void main(String[] args)
  {
    // Get the appropriate command depending on the operating system.
    String os_name = System.getProperty("os.name");
    String cmdLine[];
    if(os_name.indexOf("Windows")!=-1)
      cmdLine= new String[] {"cmd", "/C", "dir > .\\test_out.txt"};   // dir > test_out.txt
    else
      cmdLine= new String[] {"/bin/sh", "-c", "ls > ./test_out.txt"}; // ls > test_out.txt
 
 
    try
    {
 
      // Print what will be run.
      System.out.println("Running: ");
      System.out.print("\t");
      for(String str: cmdLine)
        System.out.print(str+" ");
      System.out.println();
 
 
      // Execute the command.
      Process process = Runtime.getRuntime().exec(cmdLine); 
 
 
      /*
      // Get console output from the command.
      BufferedReader in = new BufferedReader(  
                          new InputStreamReader(process.getInputStream()));  
      String line = null;  
      while ((line = in.readLine()) != null)
      {  
          System.out.println(line);  
      }       
      */
 
      try { process.waitFor(); } catch(InterruptedException ex){ ex.printStackTrace(); } // Wait for the process to terminate.
      if(process.exitValue()==0)
        System.out.println("true");
      else
        System.out.println("false");      
 
    }
    catch(IOException ex)
    {
      ex.printStackTrace();
    }
 
  }
 
}