In Java it is possible to restrict access to specific functions like reading/writing files and system properties, thread control, networking, object serialization and much more for the running application. Such restrictions may be crucial for guaranteeing security of the system and are implemented for example in Applets, Java Web Start or Java EE Servers.
Class [...]
Using Java SecurityManager to grant/deny access to system functions
How to check if String is parseable to Integer or Double?
This seems basic, right? In most cases it is, but as almost everything in Java this problem has its subtle pitfalls and problems. It is mainly because Java does not provide a simple utility method that can answer this question. Today I wanted to share with you several ways of solving this problem and describe [...]
What is MessageFormat?
There are many ways to create a user readable message in Java, differing in the complication level, performance and capabilities. The easiest is to create the String message by using “+” operator and casting all message parameters to string. If the message is longer or more complicated you can use StringBuilder instead. For more advanced [...]