Running Cygwin command from java

Lets take simple ls command to be run inside java code
Following are the steps

File workDir = new File("C:/cygwin/bin");
String cmd = "bash --login -i -c \" ls \"";
Runtime rt = Runtime.getRuntime();
Process pr = rt.exec(workDir+"/"+cmd, null, workDir);
int i = pr.waitFor();


if (i == 0){

BufferedReader input1 = new BufferedReader(new InputStreamReader(pr.getInputStream()));

String line=null;
while((line=input1.readLine()) != null) {
System.out.println(line);
}

}else{

BufferedReader stdErr = new BufferedReader(new InputStreamReader(pr.getErrorStream()));
// read the output from the command
String s = null;
while ((s = stdErr.readLine()) != null) {
System.out.println(s);
}

}