map(name -> { // keep only last names String ... Streams and lambdas are an incredibly useful way to work with Java’s collections. Functional programming is in general a great addition to ...

/** * Instantiate my collections with empty versions using Collections fields. * This will result in javac compiler warnings stating "warning: [unchecked] * unchecked conversion". */ public void ...

The Map interface represents an abstract data ... We've looked at the fundamentals of the Java Collections Framework and seen how to create new data structures based on abstract base classes ...

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 application requirement, the three best ways to solve the ...