java.lang.Runtime exec() programs works on solaris and hangs on windows

Test Program: TestMain.java and Test.java
----------------------
 
  
import java.util.prefs.*;
import java.util.*;
import java.io.*;

 
 
public class TestMain {
 
   static final int TOTAL = 11;
   
   public static void main(String[] args) throws Exception {
         try {
                String cmds = "java Test";
                //exec proces01
                Process processP1 = Runtime.getRuntime().exec(cmds);
                
                InputStream inP1 = processP1.getInputStream();
                DataInputStream dinP1 = new DataInputStream(inP1);
                String lineP1 [] = new String[TOTAL+1];
                int intP1 = 0;
                try {
                    processP1.waitFor();
                } catch (InterruptedException e) {
                    System.out.println ("InterruptedException thrown in TestMain failed " + e);
                    e.printStackTrace();
                }
                System.out.println("processP1.exitValue() exited with " + processP1.exitValue());
                if (processP1.exitValue() !=0) {
                    throw new Exception("processP1.exitValue() !=0 in TestMain");
                }
                while ((lineP1[intP1] = dinP1.readLine()) != null) {
                    System.out.println("got string from Test = " + lineP1[intP1]);
                    intP1++;
                }
                inP1.close();
                dinP1.close();
              System.out.println("TestMain passed");
    } catch (Exception e) {
            System.out.println (" Exception thrown in TestMain failed " + e);
       e.printStackTrace();
        }
     }
   
   }

----------------------------Test.java--------------
 
 

import java.util.prefs.*;
import java.util.*;
 
 
public class Test {
  
   static final int TOTAL = 11;
   public static void main(String[] args) throws Exception {
             for (int i=0; i<TOTAL; i++) {
                System.out.println(i);
             }
  
   }
}

--------------------result on solaris works ---------
javasupport2:/home/pande/merlin/bugs/runtime 114 % java TestMain
processP1.exitValue() exited with 0
got string from Test = 0
got string from Test = 1
got string from Test = 2
got string from Test = 3
got string from Test = 4
got string from Test = 5
got string from Test = 6
got string from Test = 7
got string from Test = 8
got string from Test = 9
got string from Test = 10
TestMain passed

-----------------------------on windowsNT hangs-------------------

--------------------