Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions.

This Java runtime exception happens when the wrong type of object is placed into an array. In the example below, a BigInteger array is created, followed by an attempt to add a Double. The Double does ...

The seventh parameter is the array of options to use. The eighth parameter is the array object to select as the default value. Simple showOptionDialog defaults. To simplify the use of the ...