OutputStream not converting into a String varible

Question

So I was going into this thinking it would be a simple 1 or 2 line code in order for me to convert the OutputStream into a String so that I can check it better with my logic.

So the code below is what I am currently working with. It works just fine if I just want to write output to the console and that's all. However, I am wanting to store that output as a string.

public static void main(String[] args) throws IOException {
    Process p;

    try {
        p = Runtime.getRuntime().exec("cmd");
        new Thread(new SyncPipe(p.getErrorStream(), System.err)).start();
        new Thread(new SyncPipe(p.getInputStream(), System.out)).start();
        PrintWriter stdin = new PrintWriter(p.getOutputStream());
        stdin.println("cd C:/Local Apps/xxx/xxx/xxxx/eclipse");
        stdin.println("lscm login -r https://xxxx.xxxx.xxxx.xxxx:9443/ccm -n xxxx.xxxx.xxx.xxxx -u itsme -P gr^34dbtfgt7y");
        stdin.close();

        p.waitFor();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

}

class SyncPipe implements Runnable {
    public SyncPipe(InputStream istrm, OutputStream ostrm) {
        istrm_ = istrm;
        ostrm_ = ostrm;
    }

    public void run() {
        try {
            final byte[] buffer = new byte[1024];

            for (int length = 0; (length = istrm_.read(buffer)) != -1;) {
                ostrm_.write(buffer, 0, length);                    
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private final OutputStream ostrm_;
    private final InputStream istrm_;
}

I'm wanting to get the data from this:

ostrm_.write(buffer, 0, length);

I've tried all sorts of things I found on google:

String string = new String(ostrm_.toString());
System.out.println(string);

String string = new String(ostrm_.toString("UTF-8"));
System.out.println(string);

final PrintStream blah = new PrintStream(ostrm_);
final String string = blah.toString();
System.out.println(string);

String blah = ostrm_.toString();
System.out.println(string);

byte[] blah = buffer;
String string = blah.toString();

I'm thinking I could use something like OutputStreamWriter but again, I can't seem to get it working. So it would be great if a Java guru can help me solve this issue that seems so easy it's hard....

UPDATE 1 for boot-and-bonnet:

Answer 1

Looks like i finally got it!

String line;
BufferedReader reader = new BufferedReader(new InputStreamReader(istrm_));

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