Tuesday Jan 14, 2014

Java Tutorial JDK8 Early Access Updates

An updated Java Tutorial was released today to coincide with the release of JDK 7u51. In addition to the changes for the 7u51 release, this update includes the following changes to JDK 8 early access documentation:

  • The Type Inference section in the Generics trail has been updated with the section Target Types, which describes how the Java compiler takes advantage of target typing to infer the type parameters of a generic method invocation in JDK 8.

  • The names of the formal parameters of any method or constructor in JDK 8 can be obtained with the method java.lang.reflect.Executable.getParameters. See the section Obtaining Names of Method Parameters.

  • The Interfaces and Inheritance trail has been enhanced with information about Default Methods in JDK 8, which are methods in an interface that have an implementation. In addition, you can define static methods in interfaces.

  • The Collections trail has been updated with new Questions and Exercises for Interfaces and Aggregate Operations in JDK 8. These updates help you focus on some important points when working with lambda expressions, streams, and aggregate operations.

For more information on JDK 8 Early Access documentation, see JDK 8 Documentation - Developer Preview Release.

JDK 7u51 and JavaFX 2.2.51 Documentation Updates

The Java Development Kit 7 Update 51 (JDK 7u51) release with JavaFX 2.2.51 is available and can be downloaded from the Java SE Downloads page. For information about this release, see the JDK 7u51 Release Notes.

Documentation has been updated for the following changes to the JDK:

  • The Exception Site List feature provides a way for users to run Java applets and Java Web Start applications that do not meet the latest security requirements. RIAs that are hosted on a site in the exception site list are allowed to run with the applicable security prompts.

  • Unsigned and self-signed RIAs are blocked when the security level is set to Very High or High. Also, the Permissions attribute that was added for 7u25 is now required when the Security Level slider in the Java Control Panel is set to either Very High or High. See the Security section of the Java Control Panel documentation for information on the criteria for allowing or blocking a RIA.

  • When signing a JAR file, time stamping the signature is recommended. A warning is shown if the signature is not time stamped. See Signing JAR Files for information.

  • When installing the JRE on Windows, or when the JRE is automatically updated on Mac OS X, users are prompted to restore the security prompts that they previously chose to hide by selecting the "Do not show this again" option.

Minor improvements have been made to some of the JavaFX tutorials, and the JavaFX API documentation has been updated for the 2.2.51 release.

For all tutorials, guides, and API documentation, see Java SE Technical Documentation and JavaFX 2 Documentation.

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