Equivalence Relation of the equals() Method An implementation of the equals() method must satisfy the properties of an equivalence relation: The general contract of the equals() method is defined between [...]
14.5 Implementing the java.util.Comparator<E> Interface The java.util.Comparator<E> interface is a functional interface and is designated as such with the @FunctionalInterface annotation in the Java SE API documentation— in other words, [...]
Output from the program: Click here to view code image class VersionNumberUnsorted array: [(3.49.1), (8.19.81), (2.48.28), (10.23.78), (9.1.1)]Unsorted list: [(3.49.1), (8.19.81), (2.48.28), (10.23.78), (9.1.1)]Unsorted map: {(10.23.78)=5000, (3.49.1)=2000, (8.19.81)=3000, (9.1.1)=6000, (2.48.28)=4000}Sorted [...]
Array Constructor References Array constructor reference is specialization of the constructor reference for creating arrays. We can convert between an array constructor reference and a lambda expression using the following [...]
Output from the program: Click here to view code image List before sorting: [(3.49.1), (8.19.81), (2.48.28), (10.23.78), (9.1.1)]List after sorting according to reverse natural ordering: [(10.23.78), (9.1.1), (8.19.81), (3.49.1), (2.48.28)]Binary [...]
The String class implements the Comparable<E> interface, providing an implementation of the compareTo() method. The compareTo() method defines the natural ordering for strings, which is lexicographical. The natural ordering is [...]
13.14 Contexts for Defining Lambda Expressions In this section, we summarize the main contexts that can provide target types for lambda expressions and method references. Declaration and Assignment Statements Ample [...]
15.1 The Java Collections Framework A collection allows a group of objects to be treated as a single entity. Objects can be stored, retrieved, and manipulated as elements of a [...]
Core Interfaces The generic Collection<E> interface is a generalized interface for maintaining collections, and is the root of the interface inheritance hierarchy for collections shown in Figure 15.1a. These generic [...]