Here is a small write-up which should help those who still write plain Java JDBC code. I know we have some wonderful persistence frameworks like Hibernate that make ones life comfortable but the reality...
XPath is a language for finding information in an XML file. You can say that XPath is (sort of) SQL for XML files. XPath is used to navigate through elements and attributes in an...
While reading through Stackoverflow, I came up to this interesting question: Java Properties File binding to Java Interface. The idea is simple but quite helpful. Basically we create an interface like: And whenever we want...
System.out and System.err stream objects are mapped to “standard” output and error stream respectively. By default, Java display standard output/error on display console. Thus, when we print a statement using System.out: It prints the...
Apache POI is a powerful Java library to work with different Microsoft Office file formats such as Excel, Power point, Visio, MS Word etc. The name POI was originally an acronym for Poor Obfuscation Implementation,...
When you use JSTL format tag <fmt:formatDate> and <fmt:formatNumber>, JSTL automatically takes care of locale resolution. Depending on the browser’s locale setting JSTL will display the date and numbers. You may want to override this default behavior....
Whenever you write a Java class in Eclipse which implements java.io.Serializable interface, you’ll get this warning: The serializable class XXXX does not declare a static final serialVersionUID field of type long Why do we...
Loading CSV file into Database can be cumbersome task if your Database provider does not offer an out of box feature for this. Most of the time you’ll spend up in creating valid insert...
If you want to work with Comma-separated Files (CSV) in Java, here’s a quick API for you. As Java doesn’t support parsing of CSV files natively, we have to rely on third party library. Opencsv is...
In Java, we play a lot with Dates. Here’s one more scenario. You have a string which has date in it. You want to convert it into a valid java.util.Date object. Now in Java you can...