Why the Process is still in deadlock when i have exhaust its error stream.

Question

There is the code:
import java.io.*;
public class ProcessExec {
  public static void main(String[] args) {
     * Test the Process created by Runtime.exec().
    Runtime rt = Runtime.getRuntime();
    String s = new String();
    if(args.length < 1) {
      System.out.println("Usage: java ProcessExec executionName");
      System.exit(-2);
    try {
      Process process = rt.exec(args[0]);
       * Buffer the error stream and exhaust it.
      System.out.println("ErrorStream data of Porcess:");
      BufferedReader br = new BufferedReader(new InputStreamReader(process.getErrorStream()));
      while( (s = br.readLine()) != null) {
        System.out.println(s);
      System.out.println("\n\n------------------------------------------------------------\n\n");
       * Buffer the input stream and exhaust it.
      br = new BufferedReader(new InputStreamReader(process.getInputStream()));
      System.out.println("InputStream data of Porcess:");
      while( (s = br.readLine()) != null) {
        System.out.println(s);
      System.out.println("Return num: " + process.waitFor());
    catch(Throwable t) {
      System.out.println(t);
}When i run the "javac" as :
C:\classses\lang\java ProcessExec javac
The process run correctly and print the error stream.
But when i run the "java" as:
C:\classes\lang\java ProcessExec java
The process was in deadlock?
Why,in my code i have buffered the error stream and input stream using a BufferedReader and then exhausted them.
And when i invoke the "javac" it ran correctly but why it couldnt run correctly when i invoked the "java" execution?

Answer 1

A deadlock occurs when two locks are dependant on each other.
This is unlikely to be the case here.
With out your exact command line or what your output is or if you have a dealock we will need to see the thread dump which displays where the deadlock is.