Compling Error

[Stephen Murphy]

I recently submitted a programming assignment to a professor in my college java course, but ran into some problems. The program compiled and ran fine on both my computer and the computer lab computer, but there were some errors found when my professor tryed to compile it. The errors were:

----jGRASP exec: javac -g
H:\UNCC\students\itcs2215-001\assignment04\wsmurph1\KnapEncrypt.java
 
decode.java:36: push(java.lang.Object) in java.util.Stack cannot be 
applied
to (int)
 resultStack.push(0);
                                    ^
decode.java:41: incompatible types
found   : java.lang.Integer
required: int
  result[i] = (Integer)resultStack.pop();
                              ^
decode.java:64: operator == cannot be applied to java.lang.Integer,int
  if((Integer)resultStack.pop() == 1)
                                                ^
decode.java:66: push(java.lang.Object) in java.util.Stack cannot be 
applied
to (int)
  resultStack.push(0);
                                     ^
decode.java:73: push(java.lang.Object) in java.util.Stack cannot be 
applied
to (int)
  resultStack.push(0);
                                     ^
decode.java:89: push(java.lang.Object) in java.util.Stack cannot be 
applied
to (int)
resultStack.push(1);
                                                   ^
decode.java:102: push(java.lang.Object) in java.util.Stack cannot be 
applied
to (int)
resultStack.push(1);
                                                   ^
decode.java:107: push(java.lang.Object) in java.util.Stack cannot be 
applied
to (int)
resultStack.push(0);
                                                   ^
decode.java:111: push(java.lang.Object) in java.util.Stack cannot be 
applied
to (int)
resultStack.push(1);
                                                   ^
encode.java:21: inconvertible types
found   : int
required: java.lang.Integer
String encodeString = ((Integer)encodeable).toString();
                                                ^
10 errors
 
 ----jGRASP wedge2: exit code for process is 1.
 ----jGRASP: operation complete.
 

Is there any reason that this would occur? Different versions of java maybe? Both me and my professor are using JGrasp under windows. I would love it if womeone could help me figure out the problem.
Thanks,
Murphy

[Steven Bell]

At a guess you were compiling under 1.5 which will automatically convert the int to an Integer and your professor was compiling under 1.4 or earlier.