For this example, we’ll look at the HashMap class, which is part of the Java Collections Framework in the java.util package. HashMap, which describes a hash table-based implementation of a map ...

java.lang.ref: A collection of reference-related language classes, such as SoftReference and ReferenceQueue, organized in the ref sub-subpackage of the java package’s lang subpackage ...

The most important rule of Java syntax: lines end with a semicolon. This punctuation tells Java (and you) that the line of code is over and isn’t intended to run on to the next line. Kind of ...

While there are workarounds -- for example, you could introduce a Factory class to generate transaction objects -- this adds complexity and could become a maintenance burden. Another approach could be ...

So to learn Java lambda syntax, you need to be familiar with its three component parts: The argument list The arrow The method body To apply these concepts, we first need a functional interface. A ...