The latest enhancements for Java garbage collection and the Java Virtual Machine are featured as well. With the upcoming Mac OS X port, we look forward to delivering simultaneous releases of the JRE across all major operating systems later this year, so all Java users will be able to take advantage of the latest features and security fixes. Java garbage collection, which helps with memory management by reclaiming programming objects, is being improved in JDK. G1 provides predictable garbage collection even for very large applications," Oracle said in a statement.
G1 is a server-style garbage collector, for multiprocessor machines with large memories, Oracle said.
Java for Mac OS X Update 4
Update 4 will be the first consumer release of Java 7 JRE, scheduled to be released as the default version on Java. JavaFX 2.
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Version 2. Sign up for a free trial. The full internal version number for this update release is 1. The external version number is 7u4. Java SE 7u4 contains Olson time zone data version c. The security baselines for the Java SE platform at the time of the release of Java SE 7u4 are specified in the following table:. For support details, see Supported System Configurations page. See Known Issues for more details.
These features include:. To revert to the previous default behavior, use the option -XX: According to specification, the JVM should not maintain any particular order of methods being returned by reflection. In previous versions, the JVM used to return the methods in the declaration order and some user code may have relied on this behavior.
The G1 collector is targeted for applications that fully utilize the large amount of memory available in today's multiprocessor servers, while still keeping garbage collection latencies under control. Applications that require a large heap, have a big active data set, have bursty or non-uniform workloads or suffer from long Garbage Collection induced latencies should benefit from switching to G1.
For more detailed information about G1 see the G1 documentation page and command line options. The new JAXP 1. For more information, see JAXP 1.
Changes in Java SE 7u211 b31
Java DB For a complete list of bugs fixed in this release, see http: This flag enables Oracle Java SE users to control when licensed features are allowed to run. All commercial features started or controlled via the command line or dynamically during execution will be gated by this flag. By default, commercial features are not allowed to execute, and any usage requires an active unlocking either on the command line or dynamically during runtime, to help remove any accidental usage.
The 7u4 installer now correctly registers javaw.
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After installing 7u4 build 22 Windows , jars can be launched correctly by double clicking them. The following command will print out these options at the command line: Right-clicking a dock icon of a Java app will not list all open Java top-level windows in the menu as Apple JDK used to do. In order to activate a window, find the window on the screen and click it directly.
This is a known issue that will be addressed in a future release. See Wildcard expansion for single entry classpath does not work on Windows platforms.
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This wildcard expansion does not work in a Windows command shell for a single element classpath due to the Microsoft bug described in Wildcard Handling is Broken. A workaround is to add another element to the classpath.
Oracle upgrades standard Java, JavaFX
For example, instead of the following:. Wildcard expansion behavior change on Windows platforms. For example, when using the following command:. In the current JDK release, wildcards in quoted arguments get expanded, and the matched file names. A workaround to produce the previous behavior is to escape the double quotes. For example, instead of the following command:. Diagnostics Synopsis: The system architecture is not recognized and the tools will fail with the error message: Support for reading core files and providing diagnostic information will not be available.
Core files from Java crashes are platform specific. When launching JDB from the command line on Windows platform, if a comma delimited JVM option is passed to either the debugger or the debuggee, it may fail with an IllegalArgumentException.