Creating streams from different sources

In this recipe, you will learn how to create streams from different sources. You have different options, as the following:

• The parallelStream() method of the Collection interface
• The Supplier interface
• A predefined set of elements
• File and a directory
• An array
• A random number generator
• The concatenation of two different streams

You can create a Stream object from other sources (that will be described in the There's more section), but we think that these are the more useful.

Getting ready

The example of this recipe has been implemented using the Eclipse IDE. If you use Eclipse or other IDE such as NetBeans, open it and create a new Java project.

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