Most efficinet method to copy arrays in Java. Example of Syste.arraycopy method.

Java example to parse json string for specifying date format.

Best way to get user’s home directory and current program execution directory in Java.

Java example to generate random secrete key using KeyGenerator class.

Best way to get local ip address of system in Java. Java example to get local ip address.

Java example code to get file extention with all checks.

Java example to detect OS type. A very simple and handy Java class to determine under laying OS type.