Copying objects is a common Java programming operation that has one serious trap. Here's how to avoid copying from an object reference and only copy the instance and values you want.

In order to add such a feature, you need to understand how Java controls data. Developers use variables in Java to hold data, with all variables having a data type and a name.

This post shows readers how to create an array in Java. Including: Array Lists, multidimensional arrays, maps, and more.

Java reference objects make caching easy Reference objects aren't just useful when memory is at a premium; they can also be used to provide slick caching abilities to any application.