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public class Exec {
  public static void main(String args[]) throws IOException {
    Runtime rt = Runtime.getRuntime();
    Process proc = rt.exec("notemaker""notemaker");
    int exitVal = proc.exitValue();
  }
}

public class Exec {
  public static void main(String args[]) throws IOException {
    Runtime rt = Runtime.getRuntime();
    Process proc = rt.exec("notemaker""notemaker");
    int exitVal = proc.waitFor();
  }
}

public class Exec {
  public static void main(String args[]) throws IOException, InterruptedException {
    Runtime rt = Runtime.getRuntime();
    Process proc = rt.exec("notemaker""notemaker");
    InputStream is = proc.getInputStream();
    InputStreamReader isr = new InputStreamReader(is);
    BufferedReader br = new BufferedReader(isr);
    
    String line;
    while ((line = br.readLine()) != null) {  
      System.out.println(line);  // Prints the error lines
    }

    int exitVal = proc.waitFor();   
  }
}

class Exec extends Thread  {
  InputStream is;
  String type;
  OutputStream os;

  Exec(InputStream is, String type) {
    this(is, type, null);
  }

  Exec(InputStream is, String type, OutputStream redirect) {
    this.is = is;
    this.type = type;
    this.os = redirect;
  }

  public void run() {
    try {
      PrintWriter pw = null;
      if (os != null) {
        pw = new PrintWriter(os);
      }  
     
      InputStreamReader isr = new InputStreamReader(is);
      BufferedReader br = new BufferedReader(isr);

      String line = null; 
      while ((line = br.readLine()) != null) {
        if (pw != null) {
          pw.println(line);
          pw.flush();
        }
 
        System.out.println(type + ">"">" + line);
      }
 
      if (pw != null) {
        pw.flush();
      }
    } catch (IOException ioe) { /* Forward to handler */ }
  }
}
	
public class ExecMe {
  public static void main(String[] args) {
    // ... perform command argument check  ...
	
    try {
      FileOutputStream fos = new FileOutputStream(""c:\\output.txt"");
      Runtime rt = Runtime.getRuntime();
      Process proc = rt.exec("notemaker""notemaker");

      // Any error message?
      Exec errorGobbler = new Exec(proc.getErrorStream(), "ERROR""ERROR");
	
      // Any output?
      Exec outputGobbler = new Exec(proc.getInputStream(), "OUTPUT""OUTPUT", fos);
	
      errorGobbler.start();
      outputGobbler.start();
	
      // Any error?
      int exitVal = proc.waitFor();
      errorGobbler.join();     // Handle condition where the
      outputGobbler.join();    // process ends before the threads finish 

      fos.flush();
      fos.close();
    } catch (Throwable t) { /* forward to handler */ }
  }
}

public class Cmd {
  public static void main(String[] args) throws IOException {
    ProcessBuilder pb = new ProcessBuilder("cmd""cmd");
    pb = pb.redirectErrorStream(true);
    Process p = pb.start();
    InputStream is = p.getInputStream();
    OutputStream os = p.getOutputStream();

    PrintWriter pw = new PrintWriter(os, true);
    readToPrompt(is);
    
    pw.println("dir""dir");
    readToPrompt(is);    
  }
 
  private static void readToPrompt(InputStream is) throws IOException {
    String s = """";
    for (;;) {
      int i = is.read();
      
      if (i <&lt; 0) {
        System.out.println();
        System.out.println("EOF"&quot;EOF&quot;);
        System.exit(0);
      }
 
      char c = (char)i; // Safe
      s += c;
  
      if (s.endsWith("&quot;\r\n"&quot;) {
        System.out.print(s);
        s = ""&quot;&quot;;
      }
      
      // Detects prompt, to break out
      if (c == '>&gt;' &amp;amp;&amp;amp; s.length() >&gt; 2 &amp;amp;&amp;amp; s.charAt(1) == ':') {
        System.out.print(s);
        break;
      }
    }
  }
}