One of my favorite standard Java classes is the Collections class . This is not surprising considering how often I find myself using the Java Collections Framework .

The standard class library includes non-static member classes as well as static member classes. For this example, we’ll look at the HashMap class, which is part of the Java Collections Framework ...

Java collection framework provides you with the complete architecture of objects. Java frameworks group of objects includes – classes, interfaces, and algorithm. Class – Everything in Java is ...

However, Java arrays do not have a size() method, nor do they have a length() method. Instead, the property length provides a Java array’s size. To further confuse matters, every Java collection class ...

How to add multiple values per key to a Java HashMap. It seems like an oversight for the standard Java API not to have a collection class that allows a key to have multiple values. If this is an ...