Most guides and books will tell you that it is very easy to change the cursor in a Java application,
but there remains a problem in that we have to remember to use the same idiom whenever we want to control the cursor. We are also mixing the cursor control code with the main ‘business logic’ of the processing. Wouldn’t it be great if the cursor control could be factored out as a separate concern?

The Template Design Pattern is perhaps one of the most widely used and useful design pattern. It is used to set up the outline or skeleton of an algorithm, leaving the details to specific implementations later. This way, subclasses can override parts of the algorithm without changing its overall structure.

Under Java environment, sometimes we need to install certificate in order to connect to secure site. Else we will hit some SSL HandShakeException, here will describe how to install the certificate to solve that problem.