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 ...

J2SE 5 provided significant new language features that made Java significantly easier to use and more expressive than it had ever been.

In Java an array is a way of storing multiple items of the same type. In this quick tutorial we introduce you to the very basics.

How to use the JOptionPane’s showOptionDialog method Java’s JOptionPane provides a simple way to read input from the user and display information back. The JOptionPane’s list of methods includes many ...

In Java, some array types are covariant and/or contravariant. In the case of covariance, this means that if T is compatible to U, then T[] is also compatible to U[].