April 24, 2001

In a big project involving several classes, logging error messages can be required. There are several ways to do this, but a simple approach is to open the log file

A generic approach to making sure a single quote (‘) does not cause a SQL statement to fail is to replace the single quote with two single quotes, as in

The Collections class provides static APIs to generate read-only orunmodifiable collections, lists, sets, or maps from specified entities. For instance, if you are sure that the ArrayList you’ve made should

Use the java.lang.Runtime run a program in a separate process.Here

When you are typecasting and using instanceof keyword in Java, there are several things you should keep in mind. Consider the following example program: class Point { int x, y;

Following are some tips for matching the most commonly used data structures with particular needs.1. When to use a Hashtable?A hashtable, or similar data structures, are good candidates if the

The java.net.HttpURLConnection class provides HTTP specific functionality. First you need to open an HttpURLConnection: URL url = new URL(

By using MACRO definitions, you can easily write lines of code that are only included in Debug versions and not in Release versions. For instance, if you create a function

Some programmers believe that int a[] and int * a are equivalent.Also some C++ books to say that pointers and arrays are almost same. This belief usually leads to hard