java-7

I am trying out Java 7 for one project and getting warnings from annotation processors (Bindgen and Hibernate JPA modelgen) of this sort: warning: Supported source version 'RELEASE_6' from annotation processor 'org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor' less than -source '1.7' This is caused by the @SupportedSourceVersion(SourceVersion.RELEASE_6) annotation on the annotation processor classes. Since they are compiled with Java 6, the highest value of SourceVersion available to them is RELEASE_6 . The Java 7 version of SourceVersion introduces RELEASE_7 . My questions: How are

From the documentation for SecondaryLoop , it is not clear when you should use this new feature instead of a SwingWorker , a few examples of interesting cases would be useful. The intent of SecondaryLoop is basically the same as SwingWorker. However, using SecondaryLoop can be less hairy than chaining together multiple SwingWorkers. Take a look at Hidden Java 7 Features – SecondaryLoop for a detailed explanation & example. 来源： https://stackoverflow.com/questions/10196809/secondaryloop-instead-of-swingworker

I made some modifications to my play project and when I try and run it I get errors. >play run Error occurred during initialization of VM Could not reserve enough space for object heap Error: Could not create the Java Virtual Machine. Error: A fatal exception has occured. Program will exit. Is this a common problem? I am fairly inexperienced with the play framework but I have ran my project several times before without encountering this error. Edit: Information regarding java version. >java -version java version "1.7.0_11" Java(TM) Runtime Environment (build 1.7.0_11-b21) Java HotSpot(TM)

The following code class GenericCompilationFailureDemo { List<? extends GenericCompilationFailureDemo> newList() { return new ArrayList<GenericCompilationFailureDemo>(); }; void useList() { List<GenericCompilationFailureDemo> list = (List<GenericCompilationFailureDemo>) newList(); } List<? extends Set<GenericCompilationFailureDemo>> newListOfSpecificSets() { return new ArrayList<Set<GenericCompilationFailureDemo>>(); }; void useListOfSpecificSets() { List<Set<GenericCompilationFailureDemo>> listOfSpecificSets = (List<Set<GenericCompilationFailureDemo>>) newListOfSpecificSets(); } List<?

So I'm getting these errors [junit] Illegal local variable table length 17 in method test.nz.ac.massey.cs.sdc.log4jassignment.s06005586.AppenderLayoutTest.()V [junit] java.lang.VerifyError: Expecting a stackmap frame at branch target 11 in method test.nz.ac.massey.cs.sdc.log4jassignment.s06005586.StressTest.()V at offset 4 [junit] java.lang.ClassFormatError: Illegal local variable table length 17 in method test.nz.ac.massey.cs.sdc.log4jassignment.s06005586.AppenderLayoutTest.()V And I would like to know how I can fix it... What I've Read: Java 7 JVM VerifyError in Eclipse Testng, Emma,

I have a working application using the spring-security kerberos extension, running on jboss, running java 6. I'm in the process of upgrading my jvm from java 6 to java 7. When I do that, using the same codebase and the same keytab that worked on java 6, I now receive an error when using java 7. I consistently receive: java.security.PrivilegedActionException: GSSException: Failure unspecified at GSS-API level (Mechanism level: Invalid argument (400) - Cannot find key of appropriate type to decrypt AP REP - RC4 with HMAC) I've tried to regenerate the keytab with the different /crypto options