Java 9 quick reference pdf download






















Horstmann covers everything developers need to know about modern Java, including Crisp and effective coverage of lambda expressions, enabling you to express actions with a concise syntax A thorough introduction to the new streams API, which Complete in 2 vols.

Complete in 2 vols , small 8vo. Bestselling programming author Herb Schildt covers the entire Java language, including its syntax, keywords, and fundamental programming principles, as well as significant portions of the Java API library. JavaBeans, servlets, applets, and Swing are examined and real-world examples demonstrate Java in action. New Java SE 8 features such as lambda expressions, the stream library, and the default interface method are discussed in detail.

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You will get full details on all of the new features and functions available in Java SE Written by Java guru Herbert Schildt, the book starts with the basics, such as how to create, compile, and run a Java program. From there, you will learn essential Java keywords, syntax, and commands.

Java: A Beginner's Guide, Eighth Edition covers the basics and touches on advanced features, including multithreaded programming, generics, Lambda expressions, and Swing. This Oracle Press guide delivers the appropriate mix of theory and practical coding necessary to get you up and running developing Java applications in no time!

Clearly explains all of the new Java SE 17 features Features self-tests, exercises, and downloadable code samples Written by bestselling author and leading Java authority Herbert Schildt.

Bestselling programming author Herb Schildt covers the entire Java language, including its syntax, keywords, and fundamental programming principles. Of course, the new module system added by Java SE 9 is discussed in detail. On the horizon, many emerging digital technologies are being developed at a breathtaking speed.

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This essential text provides a compact roadmap to networked e-business for engineering, information systems or business students as well as professionals in the field. Bestselling programming author Herb Schildt begins with the basics, such as how to create, compile, and run a Java program. Using REPL, we can code and test java based logic without compiling using javac and see the result of calculations directly. Java documentation can be generated using javadoc tool. It currently generates documentation in html 4.

In java 9, we can generate documentation in html 5 format by using -html5 option in command line arguments. In java 9, a new feature is introduced where a jar format has been enhanced to have different versions of java class or resources can be maintained and used as per the platform.

MF file has a entry Multi-Release: true in its main section. META-INF directory also contains a versions subdirectory whose subdirectories starting with 9 for Java 9 store version-specific classes and resource files. In this example, we'll be using a multi-release jar to have two versions of Tester.

Create Test. With Java 9, new factory methods are added to List, Set and Map interfaces to create immutable instances. These factory methods are convenience factory methods to create a collection in less verbose and in concise way. With java 9, following methods are added to List, Set and Map interfaces along with their overloaded counterparts. For List and Set interfaces, of In case of more than 10 paramters for Map interface, ofEntries So we cannot have method implementation in interfaces or more precisely a default implementation prior to Java 8.

See the example. In above example, each log method has its own implementation. In above example, we're having repeation again. In Java 9 Process API which is responsible to control and manage operating system processes has been improved considerably. ProcessHandle Class now provides process's native process ID, start time, accumulated CPU time, arguments, command, user, parent process, and descendants. ProcessHandle class also provides method to check processes' liveness and to destroy processes.

It has onExit method, the CompletableFuture class can perform action asynchronously when process exits. Streams were introduced in Java to help developers perform aggregate operations from a sequence of objects.

With Java 9, few more methods are added to make streams better. It returns, in case of ordered stream, a stream consisting of the longest prefix of elements taken from this stream matching the given predicate. It returns, in case of ordered stream, a stream consisting of the remaining elements of this stream after dropping the longest prefix of elements matching the given predicate. This method returns a sequential Stream containing single element, if non-null, otherwise returns an empty Stream.

The try-with-resources statement is a try statement with one or more resources duly declared. Here resource is an object which should be closed once it is no more required.

The try-with-resources statement ensures that each resource is closed after the requirement finishes. Any object implementing java. AutoCloseable or java. Closeable, interface can be used as a resource. Prior to Java 9, resources are to be declared before try or inside try statement as shown below in given example.

In this example, we'll use BufferedReader as resource to read a string and then BufferedReader is to be closed. Here we need to declare a resource br1 within try statment and then use it. In Java9, we don't need to declare br1 anymore and following program will give the same result. Deprecated annotation was introduced in java 5 version. Compiler generates warnings whenever a deprecated element is used. With Java 9, two new enhancements are made to Deprecated annotation.

The default value is false. The default value is the empty string. Following example of Boolean class javadoc on Java 9 illustrate the use of since attribute on Deprecated annotation. Boolean Class.

Following example of System class javadoc on Java 9 illustrate the use of forRemoval attribute on Deprecated annotation. System Class.

Diamond operator was introduced in java 7 to make code more readable but it could not be used with Anonymous inner classes. In java 9, it can be used with annonymous class as well to simplify code and improves readability. Consider the following code prior to Java 9. In java 9, three new methods are added to improve its functionality. If a value is present, it returns a sequential Stream containing only that value, otherwise returns an empty Stream. If a value is present, performs the given action with the value, otherwise performs the given empty-based action.

If a value is present, returns an Optional describing the value, otherwise returns an Optional produced by the supplying function. With Java 9, a new multi-resolution image API has been introduced which supports multiple images with different resolution variants.



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