java-7

I am testing JPA2.1 and the new "schema generation" feature. For that, I tested two implementations under the HyperSQL database : EclipseLink 2.5.2-M1 which is the reference implementation. Hibernate 4.3 I don't have any preference for an implementation (not even for performance). I tested EclipseLink because it was the first JPA2.1 implementation available, but now, Hibernate 4.3 is here and JPA2.1 compliant. The only thing I want is to get something independent from the JPA provider - except for the configuration (like cache, logging, static weaving, ...). As for schema generation, several

I'm looking for a neat way to override a class from the bootstrap class path, rt.jar . The reason is OpenJDK7 bug http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7104625 The fix for this bug is a trivial (see linked mailing list post) change to sun.awt.X11.XComponentPeer . So I was wondering if there is an easy way to override just this one affected class on my classpath, without having to repack/rebuild rt.jar (so the fix isn't lost on the next automatic update of OpenJDK). Ideally, it would also affect Eclipse... I assume that java -Djava.system.class.loader=myClassLoader would work? Is

Today, our Enterprise Architect mentioned that a recent vulnerability was discovered in the JRE 1.7. I found an article the JRE 1.7 vulnerability recommending disabling Java . I am running JDK 1.5 and 1.6 at work (like many organizations, we're not on the latest of technologies), so no problems there. At home I am doing development with Java SE 7u6. I'm playing with Grails, Spring Security, trying to keep learning. I have already gone and disabled the Java Plug-in in all my browsers on my home development machine. However, does anyone know if my home dev machine is still vulnerable by virtue

I just discovered this today when one of my unit tests failed because of upgrading from Java 7 to Java 8. The unit test calls a method which tries to find an annotation on a method which is annotated on a child class but with a different return type. In Java 7, isAnnotationPresent seems to only find annotations if they were really declared in code. In Java 8, isAnnotationPresent seems to include annotations that were declared in child classes. To illustrate this I created a simple (??) test class IAPTest (for IsAnnotationPresentTest). import java.lang.annotation.Retention; import java.lang

In JSR 294 the superpackage feature for Java is specified. It should debut in Java 7, but the JSR is marked as inactive and Java 7 was released half a year ago. Definite information on superpackages are somewhat hard to come by on the net, there are numerous articles on the 'upcoming superpackages', but hardly any on the current state of the feature. So my question is: What is the status of the feature? I believe it is now called modules and should be part of Java 8 Java 9 - you can find more information in JSR 337 (search for module on the page). Modules are covered by Project Jigsaw . 来源：

We began to notice that with Java 7 (particularly with update 4), that all our users began to see this with our Webstart app: [14:42:58,422] AWT-EventQueue-0(DEBUG) java.lang.SecurityException: class "CLASSNAME" does not match trust level of other classes in the same package [14:42:58,422] AWT-EventQueue-0(DEBUG) at com.sun.deploy.security.CPCallbackHandler$ChildElement.checkResource(Unknown Source) [14:42:58,422] AWT-EventQueue-0(DEBUG) at com.sun.deploy.security.DeployURLClassPath$JarLoader.checkResource(Unknown Source) [14:42:58,422] AWT-EventQueue-0(DEBUG) at com.sun.deploy.security

I found some classes designed for debugging in package com.sun.jdi like VirtualMachine , but I can't use this because package seems not exist in Sun JDK7. How to use this package? BTW. lib/sa-jdi.jar isn't the same I want According to this page , the VirtualMachine class that you linked to is part of the tools.jar file which is only distributed in a JDK (not a JRE). It says ... " Update Note 2: The Attach API is in tools.jar, so you will need to add /lib/tools.jar in your CLASSPATH to compile and run the example on JDK 6." ... and the same advice would apply on (at least) JDK 7 as well. 来源：