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README.md

Java 8 Release Notes

Java Programming Language

Collections

Concurrency

  • Classes and interfaces have been added to the java.util.concurrent package.
    • Interface CompletableFuture.AsynchronousCompletionTask: A marker interface identifying asynchronous tasks produced by async methods.
    • Interface CompletionStage<T>: A stage of a possibly asynchronous computation, that performs an action or computes a value when another CompletionStage completes.
    • Class CompletableFuture<T>: A Future that may be explicitly completed (setting its value and status), and may be used as a CompletionStage, supporting dependent functions and actions that trigger upon its completion.
    • Class ConcurrentHashMap.KeySetView<K,V>: A view of a ConcurrentHashMap as a Set of keys, in which additions may optionally be enabled by mapping to a common value.
    • Class CountedCompleter<T>: A ForkJoinTask with a completion action performed when triggered and there are no remaining pending actions.
    • Class CompletionException: Exception thrown when an error or other exception is encountered in the course of completing a result or task.
  • Methods have been added to the java.util.concurrent.ConcurrentHashMap class to support aggregate operations based on the newly added streams facility and lambda expressions.
  • Classes have been added to the java.util.concurrent.atomic package to support scalable updatable variables.
  • Methods have been added to the java.util.concurrent.ForkJoinPool class to support a common pool.
  • The java.util.concurrent.locks.StampedLock class has been added to provide a capability-based lock with three modes for controlling read/write access.

Date-Time Package

  • java.time - Classes for date, time, date and time combined, time zones, instants, duration, and clocks.
  • java.time.chrono - API for representing calendar systems other than ISO-8601. Several predefined chronologies are provided and you can also define your own chronology.
  • java.time.format - Classes for formatting and parsing dates and time.
  • java.time.temporal - Extended API, primarily for framework and library writers, allowing interoperations between the date and time classes, querying, and adjustment. Fields and units are defined in this package.
  • java.time.zone - Classes that support time zones, offsets from time zones, and time zone rules.
  • JSR 310: Date and Time API

java.lang and java.util Packages

  • Parallel Array Sorting
  • Standard Encoding and Decoding Base64
  • Unsigned Arithmetic Support

JDBC

  • The JDBC-ODBC Bridge has been removed.
  • JDBC 4.2 introduces new features.

Java DB

  • JDK 8 includes Java DB 10.10.

Java XML - JAXP

Networking

  • The class java.net.URLPermission has been added.
  • In the class java.net.HttpURLConnection, if a security manager is installed, calls that request to open a connection require permission.

IO and NIO

  • New SelectorProvider implementation for Solaris based on the Solaris event port mechanism. To use, run with the system property java.nio.channels.spi.Selector set to the value sun.nio.ch.EventPortSelectorProvider.
  • Decrease in the size of the <JDK_HOME>/jre/lib/charsets.jar file
  • Performance improvement for the java.lang.String(byte[], *) constructor and the java.lang.String.getBytes() method.

HotSpot

  • Hardware intrinsics were added to use Advanced Encryption Standard (AES). The UseAES and UseAESIntrinsics flags are available to enable the hardware-based AES intrinsics for Intel hardware. The hardware must be 2010 or newer Westmere hardware.

    • Note: AES intrinsics are only supported by the Server VM.
    • For example, to enable hardware AES, use the following flags:
    -XX:+UseAES -XX:+UseAESIntrinsics
    • To disable hardware AES use the following flags:
    -XX:-UseAES -XX:-UseAESIntrinsics

  • Removal of PermGen.

  • Default Methods in the Java Programming Language are supported by the byte code instructions for method invocation.

Security

  • Client-side TLS 1.2 enabled by default.
  • New variant of AccessController.doPrivileged that enables code to assert a subset of its privileges, without preventing the full traversal of the stack to check for other permissions.
  • Stronger algorithms for password-based encryption.
  • SSL/TLS Server Name Indication (SNI) Extension support in JSSE Server.
  • Support for AEAD algorithms.
  • KeyStore enhancements.
  • SHA-224 Message Digests.
  • Enhanced Support for NSA Suite B Cryptography.
  • Better Support for High Entropy Random Number Generation.
  • New java.security.cert.PKIXRevocationChecker class for configuring revocation checking of X.509 certificates.
  • 64-bit PKCS11 for Windows.
  • New rcache Types in Kerberos 5 Replay Caching.
  • Support for Kerberos 5 Protocol Transition and Constrained Delegation.
  • Kerberos 5 weak encryption types disabled by default.
  • Unbound SASL for the GSS-API/Kerberos 5 mechanism.
  • SASL service for multiple host names.
  • JNI bridge to native JGSS on Mac OS X.
  • Support for stronger strength ephemeral DH keys in the SunJSSE provider.
  • Support for server-side cipher suites preference customization in JSSE.

Tools

  • The jjs command is provided to invoke the Nashorn engine.
  • The java command launches JavaFX applications.
  • The java man page has been reworked.
  • The jdeps command-line tool is provided for analyzing class files.
  • Java Management Extensions (JMX) provide remote access to diagnostic commands.
  • The jarsigner tool has an option for requesting a signed time stamp from a Time Stamping Authority (TSA).
  • Javac tool
    • The -parameters option of the javac command can be used to store formal parameter names and enable the Reflection API to retrieve formal parameter names.
    • The type rules for equality operators in the Java Language Specification (JLS) Section 15.21 are now correctly enforced by the javac command.
    • The javac tool now has support for checking the content of javadoc comments for issues that could lead to various problems, such as invalid HTML or accessibility issues, in the files that are generated when javadoc is run. The feature is enabled by the new -Xdoclint option. For more details, see the output from running javac -X. This feature is also available in the javadoc tool, and is enabled there by default.
    • The javac tool now provides the ability to generate native headers, as needed. This removes the need to run the javah tool as a separate step in the build pipeline. The feature is enabled in javac by using the new -h option, which is used to specify a directory in which the header files should be written. Header files will be generated for any class which has either native methods, or constant fields annotated with a new annotation of type java.lang.annotation.Native.
  • Javadoc tool
    • The javadoc tool supports the new DocTree API that enables you to traverse Javadoc comments as abstract syntax trees.
    • The javadoc tool supports the new Javadoc Access API that enables you to invoke the Javadoc tool directly from a Java application, without executing a new process. See the javadoc what's new page for more information.
    • The javadoc tool now has support for checking the content of javadoc comments for issues that could lead to various problems, such as invalid HTML or accessibility issues, in the files that are generated when javadoc is run. The feature is enabled by default, and can also be controlled by the new -Xdoclint option. For more details, see the output from running javadoc -X. This feature is also available in the javac tool, although it is not enabled by default there.

Scripting

  • The Rhino javascript engine has been replaced with the Nashorn Javascript Engine.

Internationalization

  • Unicode Enhancements, including support for Unicode 6.2.0
  • Adoption of Unicode CLDR Data and the java.locale.providers System Property
  • New Calendar and Locale APIs
  • Ability to Install a Custom Resource Bundle as an Extension

Deployment

  • For sandbox applets and Java Web Start applications, URLPermission is now used to allow connections back to the server from which they were started. SocketPermission is no longer granted.
  • The Permissions attribute is required in the JAR file manifest of the main JAR file at all security levels.

Compact Profiles

Pack200

  • Pack200 Support for Constant Pool Entries and New Bytecodes Introduced by JSR 292
  • JDK8 support for class files changes specified by JSR-292, JSR-308 and JSR-335

JavaFX

  • The new Modena theme has been implemented in this release.
  • The new SwingNode class enables developers to embed Swing content into JavaFX applications.
  • The new UI Controls include the DatePicker and the TreeTableView controls.
  • The javafx.print package provides the public classes for the JavaFX Printing API.
  • The 3D Graphics features now include 3D shapes, camera, lights, subscene, material, picking, and antialiasing. The new Shape3D (Box, Cylinder, MeshView, and Sphere subclasses), SubScene, Material, PickResult, LightBase (AmbientLight and PointLight subclasses), and SceneAntialiasing API classes have been added to the JavaFX 3D Graphics library. The Camera API class has also been updated in this release.
  • The WebView class provides new features and improvements. Review Supported Features of HTML5 for more information about additional HTML5 features including Web Sockets, Web Workers, and Web Fonts.
  • Support for Hi-DPI displays has been added in this release.
  • The CSS Styleable classes (javafx.css javadoc) became public API.
  • The new ScheduledService class allows to automatically restart the service.
  • JavaFX is now available for ARM platforms. JDK for ARM includes the base, graphics and controls components of JavaFX.

Java Mission Control 5.3