We had our third JEG (Java Education Group?) meeting today about Java certifications. We changed our approach and now we are just solving certification questions…
Creative Commons photo by jekemp public class PreventTimeTravelers { public static void main(String args[]){ long startTime = System.currentTimeMillis(); long endTime = System.currentTimeMillis(); assert endTime >=…
NumberFormatException: Thrown to indicate that the application has attempted to convert a string to one of the numeric types, but that the string does not…
JRuby is a Java implementation of the Ruby interpreter, with an tightly integrated with Java. In this examples you will call swing components. On Ubuntu…
Creative Commons Image Está cada vez mais fácil colaborar com projetos livres.Quem diria que você poderia blogar sobre um projeto livre e ainda ganhar dinheiro…
A very simple Java chronometer code (inspired in the chronometer code in Opale project) you can use for simples measures. In the main method there’s…
This code prints out your system properties. import java.util.Properties; public class PropertiesLister{ public static void main (String args[]){ Properties props = System.getProperties(); props.list(System.out); } }…
I just received my CEJUG T-Shirt. Front view a Java logo in the arm and CEJUG website in the back You can buy yours at…