Question: Is there a simple way of copying a file from one directory to another? Answer: There is no predefined convenient method for copying a file from oneplace to another. You have to do it the old fashioned way. Open thesource file, open the destination file, read the source file
Question: When I use onstat -d, the message “No response from server process” pops up. Then I can’t shutdown the database or do any other jobs. I could use dbaccess, but my dbspace is 1GB and doesn’t have any blobspace. What do I do? Answer: I’m assuming you’re on a
Question: I’m trying to translate from VC++ to Java. Can you declare a variableDWORD in Java? If not, what is the Java equivalent? Also, what is theequivalent for HINSTANCE? Answer: Java differs from C and C++ in that all of its fundamental data types havespecified sizes that are guaranteed to
Question: Is there something similar to the C/C++ compiler directive #ifdef,#define, and #endif in Java? I would like to compiledebugging code conditionally. Answer: This is one of the first questions that crossed my mind when I firststarted programming in Java. The disappointing answer is no. Noteveryone agrees on the need
Question: I’m using a catch(exception e). When I come in the catch-block and print the message belonging to the exception, I receive the message “9exception.” What does it mean? Answer: The exact textual description of C++ exception is compiler-dependent. The Standard requires that they be null-terminated C-strings, but nothing more.
Question: I am calling a java program from a Unix script and passing threeparameters. Once the Java program is done, I want to return two valuesback to the Unix program from the Java program. How do I return data backfrom a Java program to a Unix script? Answer: The simplest,
Question: How do I restrict the number of characters to be entered in a TextField? Answer: Setting a maximum character count is not a built-in function ofTextField. You have to subclass TextField to implement this yourself.You want to intercept the keystrokes before they are recorded andcount how many characters have
Question: An error occurs in the Exchange event log stating that my customers are out of licenses when clearly they are not. How come? Answer: Since they have enough legal licenses, disable the Licensing service. I know that sounds odd, but frankly the problem you describe is very common and
Question: Why do I have to catch an exception when I use System.in.read()? Answer: System.in is an InputStream, and like any InputStream, an I/O errormay occur when you read from it. For example, the Java program mayhave been run as a background process with no standard input, causingan error during