How to use Runtime.getRuntime().exec, How to solve java.io.IOException, error 2, Use Dos command in Java

This below code is very perfect to use Runtime.getRuntime().exec in windows platform as well as unix platform. You will not get ioexception error2 using this code.

Here, there are three method. Out of these first two you can put in common java file. Three is calling method to execute any dos commnad.

public Boolean exec(String[] command) {
Process proc;
StringBuffer cmdStr= new StringBuffer();
for(int i=0; icmdStr.append(command[i].trim());
if(i!=command.length-1){
cmdStr.append(" ");
}
}
try {
proc = Runtime.getRuntime().exec(cmdStr.toString());
} catch (IOException e) {
System.out.println("EXCEPTION_IO" + command);
System.out.println("EXCEPTION_TRACE"+ e);
return new Boolean(false);
}
int exitStatus;
while (true) {
try {
exitStatus = proc.waitFor();
break;
} catch (java.lang.InterruptedException e) {
System.out.println("EXCEPTION_TRACE"+ e);
}
}
if (exitStatus == 0) {
InputStream is = proc.getInputStream();
readStreamData(is);
}
if (exitStatus != 0) {
InputStream e = proc.getErrorStream();
String error = readStreamData(e);
System.out.println("ERROR_COMMAND"+ error);
}
return new Boolean(exitStatus == 0);
}

private static String readStreamData(InputStream e) {
BufferedInputStream bre = new BufferedInputStream(e);
String output = new String(" ");
try {
int readInt = bre.read();
while (readInt != -1) {
char c = (char) readInt;
output = output + c;
readInt = bre.read();
}
} catch (IOException e1) {
e1.printStackTrace();
}
return output;
}


public void copyFile(){
String sourceFile = "c:\\abcd\\mainImage\\DSC01596.JPG";
String destFile = "C:\\BackupImage\\Home";
List command = new ArrayList();
command.add("cmd.exe");
command.add("/c");
command.add("copy");
command.add(sourceFile);
command.add(destFile);
System.out.println("Executing Command :: " + command);
if(exec((String[]) command.toArray(new String[1]))){
System.out.println("Copied Successfully");
}
else{
System.out.println("Some Problem during copy");
}
}