Discover how to get up and running

Explore the use of variables and

Discover how to work with branching

Explore the essential elements of

Explore the concepts of

Explore working with strings in

Explore the JDK API documentation

Discover how to implement flow

Examine the methods of polymorphism in Java using inheritance, with subclasses and superclasses, and the use of abstract classes.

Explore the use of inheritance

Explore the use of try/catch blocks

Examine how to package Java

Explore the use of the JShell REPL

• Explore Java SE 11 and its language enhancements, the Shebang
• mechanism, and key features. Discover how to create and run simple
• executable Java programs, as well as how to create, import, and
• manipulate packages and strings. How to declare and initialize
• variables, work with local variable type inference, transform null
• or empty strings into an empty optional, and execute Single-File
• Source-Code programs is also covered.

• Explore the structure of Java classes, as well as how to work
• with Java control statements, Java operators, and loops. Discover
• how to declare, instantiate, initialize, and work with
• one-dimensional array, two-dimensional array, and Java objects.
• Finally, how to read and write to object fields and manipulate data
• with the StringBuilder class is also covered.

• Discover object-oriented programming (OOP) basics including how
• to create methods, overloaded methods, constructors with arguments,
• subclasses, and superclasses in Java. Examine how to extend
• abstract classes, apply the static keyword to methods and fields,
• apply access modifiers, apply encapsulation principles to classes,
• enable polymorphism, and use polymorphism to cast and call
• methods.

• Explore the differences between overloading, overriding, and
• hiding, as well as the differences between class inheritance and
• interface inheritance. Examine checked and unchecked exceptions and
• errors, along with the characteristics of Modular JDK in Java SE
• 11. In addition, discover how to create interfaces and try-catch
• blocks, create and invoke methods throwing exceptions, and work
• with list instances, ArrayList instances and Lambda
• expressions.

• Explore the concept of HotSpot, how to control JVM compilation
• with compiler directives, the changes introduced in JDK 11, and the
• performance enhancements in Oracle’s HotSpot Virtual Machine.
• Examine the role of class data sharing and the features of Native
• Memory Tracking. How to write directives to control compilation,
• transform null or empty strings into empty optional, and work with
• Java SE 11 nest-based access control is also covered.

1Z0-806 - Java SE 11 Programmer II: Core Java Libraries

1Z0-806 - Java SE 11 Programmer II: Class Concepts & Managing Exceptions

• Explore the concepts of Generics and Collections in Java,
• including different types of Generics, the Collections framework,
• implementations of Adapter and Map interfaces, features of
• concurrent implementations, and custom collection development.
• Discover how to create and use interfaces with default and private
• methods, simplify programs with Wrapper classes, and manage objects
• with boxing and unboxing. Working with diamond notation,
• NavigableSet, ConcurrentMap, ConcurrentNavigableMap, and marker
• interfaces is also covered.

• Explore implementations of comparable subinterfaces, the
• features of the Collator and RuleBasedCollator classes, the rules
• of functional interfaces and their role in functional programming,
• and the structure and syntax of building Lambda expressions.
• Discover how to work with the Comparator and Comparable interfaces,
• RuleBasedCollator, convenience factory methods and functional
• interfaces, as well as how to create and work with Lambda
• expressions and Lambda statements in Java SE 11.

• Explore streams and the Stream APIs, the differences between

• collections and streams, the structure of stream operations and
• pipelines, and methods of Stream interface in Java SE 11. Discover
• how to create basic streams and apply methods on them, apply
• reduction on parallel operations to manage concurrency, use the
• StreamSupport class to create low-level streams, and prevent
• interference when executing stream pipelines.

• Explore the java.util.function package interfaces, the roles of
• the Predicate, Consumer, Function, and Supplier interfaces,
• approaches for searching Stream data, and Optional class methods.
• Discover how to work with Lambda expressions, method references,
• and Function package interfaces, as well as how to extract, search,
• and match Stream data using the Stream API. How to implement
• calculations using the count, max, min, average and sum Stream
• operations is also covered.

• Explore the concept of NIO.2, implementing buffers, the
• attributes and methods of Path and File classes, and the channels
• supporting asynchronous I/O operations. Discover how to perform
• file I/O operations, manage metadata and walk a file tree using
• NIO.2, watch for changes in directories, use asynchronous datagram
• channels and multicasting, and implement completion handlers. Using
• the new java.nio.file.files class methods that were added in the in
• Java SE 11 is also covered.

• Explore cyclic dependency, the different types and components of
• services, service design and development, and service provider
• deployment as modules. Discover how to migrate from Java SE 9 to
• Java SE 11, run modularized applications, use JDeps, obtain service
• loaders, create worker threads, work with java.util.concurrent
• collections and classes, and write thread-safe code.

• Explore threading problems, the different states of threads, and
• concurrency management packages, synchronization classes, memory
• consistency properties. Examine the the Executor interface, classes
• that can be used to provision tuneable thread pools, and the
• exceptions that can be thrown while working with concurrency. How
• to use the CountDownLatch and CyclicBarrier classes, use the
• ForkJoinPool and ForkJoinTask methods, and work with the TimeUnit
• enum is also covered.

• Explore data integrity guidelines, how to enable accessibility
• and extensibility in Java applications, and how to handle input
• validation and mutability. Examine Java Cryptography Architecture,
• the Engine classes provided by JCA, and capabilities of the
• Provider class. Discover how to prevent Denial-of-Service and
• secure confidential information in Java applications, secure
• sensitive objects, and secure serialization and deserialization.
• How to generate key pairs, verify signatures with the generated key
• pairs, and secure socket code is also covered.

• Explore the contents of the java.sql package, how various SQL
• types are mapped to classes and interfaces, and enhancements in the
• features of the javax.sql package. Examine the Enum classes and
• their uses in JDBC and RowSet objects that can be used to hold
• tabular data in Java SE 11. In addition, discover how to connect to
• databases, perform CRUD operations with PreparedStatement, perform
• database operations using PreparedStatement and CallableStatement,
• work with DatabaseMetaData and ParameterMetaData interfaces, and
• use RowSet objects to manage data.

• Explore the concept of localization in Java SE 11, including
• locale management, using the Locale class, and resource bundles and
• their uses. Discover how to format messages, dates, and numbers, as
• well as how to work with commonly used annotations and the
• Annotation package Enums. In addition, how to create and use
• resource bundles, apply annotations to classes and methods, and
• build and declare custom annotations is also covered.