DWITE Turing Discoveries.

[Mr.S.]

The input data files for the first submission are usually different than the input data files for the second submission. It is possible that your code got hung up on the first submission but not on the second submission. The input and output files are posted under Previous Contest Results link at www.dwite.org. Check out your code against these files.

Mr.S.

cool dude wrote:

another wierd thing about dwite is that at times we submit our program and it says it took too long to run when it clearly runs less than a second. so we submit it it the second time and we get full points for it.

[Mr.S.]

The DWITE judge currently uses Excelsior Jet Personal Edition Java Compiler - jc.exe which can handle Java 2 - 1.4. It was free from their site a couple of years ago. Their current compiler which is compatible with Java 2 - 1.5 costs $100 for an educational license. I have contacted Excelsior, and asked them to send me a free copy. I am waiting for a reply.

If someone knows of another way for me to handle Java with the DWITE judge, please let me know.

Thanks. Mr.S.

McKenzie wrote:

I was bugging Will to upgrade to Java 1.5. He told me it was top priority. Instead he posted on his site that they are using 1.4. Oh well, at least it's not as bad as the University of Windsor competition where they assured us they could handle 1.5, only to discover at the last minute that they could only use 1.4.

[Tony]

I would say Sun's javac, but that just seems way too trivial. I must be missing something.

code:

javac Source.java java Source.class

[wtd]

It's free Tony, and therefore must be inferior.

[Tony]

I get your sarcasm, but

Mr. S wrote:

Excelsior Jet Personal Edition Java Compiler ... was free from their site a couple of years ago.

Actually it would be for the best to move away from the paid compilers for the reasons discussed here. It would not be fair to participating students if the judge is running a paid propriatory compiler that they can't get a hold of to get accustomed to, or at least test before the submission.

That's why next year DWITE will be running javac

[Mr.S.]

Excuse my ignorance with Java.

Prog1_1.java contains the following code:

code:

import java.io.*; // Java I/O import java.text.DecimalFormat; // Formatting public class Prog1_1 {         public static void main(String args[]) throws IOException         {                 BufferedReader input = new BufferedReader( new FileReader("DATA11.txt") );                 PrintWriter output = new PrintWriter ( new FileWriter("OUT11.txt"));                 DecimalFormat twoDigits = new DecimalFormat("0.00");                 for(int i=1; i<=5; i++)                 {                         double number = Double.parseDouble(input.readLine());                         output.println(twoDigits.format(number*number));                 }                 output.close();                 System.exit(0);         } }

I execute: javac prog1_1.java and it creates prog1_1.class
I execute: java prog1_1.class and get the following error:
Exception in thread "main" java.lang.NoClassDefFoundError: prog1_1/class

Help?

Mr.S.

Tony wrote:

I would say Sun's javac, but that just seems way too trivial. I must be missing something.

code:

javac Source.java java Source.class

[zylum]

javac prog1_1.java
java prog1_1.class

it's case-sensitive so should be Prog1_1.java/class

also i dont think your class should be public.

[Andy]

it does have to be public

[Mr.S.]

Same error.

I'm certain that I have the case-sensitive problem resovled. If the class is not public, how should it be coded.

Again, excuse my ignorance about Java. This is probably quite trivial, but I have done no programming in Java.

Thanks. Mr.S.

zylum wrote:

javac prog1_1.java
java prog1_1.class

it's case-sensitive so should be Prog1_1.java/class

also i dont think your class should be public.

[Tony]

apparently it's because

Quote:

java.lang.NoClassDefFoundError: sun/tools/javac/Main means that your classpath is not set correctly. Make sure your JAVA_HOME is set up right

Which would be pretty redicilous, since I'm getting the same exception on Solaris ! Then again other trivial java programs through the same thing.

[Andy]

oh! that's not what you call.

javac prog1_1.java
java prog1_1

[Tony]

oh wow, Andy's right. Totally my bad (that's what you get for not doing Java in so long).

could someone enlighten me as to what the deal with .class is then? I would guess that it is added implicitly by java, but then why is there that exception if prog.class.class is called?

[Andy]

try to do a java on some other random file, it should give you the same error. in the prog1_1.class.class there is no main class =P

[Tony]

Andy wrote:

try to do a java on some other random file, it should give you the same error.

It does

Tony wrote:

on Solaris ! Then again other trivial java programs through the same thing.

Andy wrote:

in the prog1_1.class.class there is no main class =P

but there is no prog1_1.class.class shouldn't it be throwing 'no file found' exception instead?

[[Gandalf]]

Tony wrote:

but there is no prog1_1.class.class shouldn't it be throwing 'no file found' exception instead?

Guess they don't know about file not found exceptions?