java-7

问题 How can I obtain all declared method through MethodHandles.lookup() ? How can I obtain all declared fields? What is difference betweeen MethodHandle.invoke() , MethodHandle.invokeExact() and MethodHandle.invokeWithArguments() Also, I will be appreciate for tutorial about using MethodHandle API for Java devloper . I emphasize, I am programming on statically typed language plain old Java and I am not JVM developer, particularly I am not interesting with whole byte-code crap (invokedynamic). I

问题 I run appengine local dev server in eclipse with params 0.0.0.0 When I try to access any of the methods I get the following error. I get the same error if I try to access api explorer http://localhost:8888/_ah/api/explorer Notes: I just updated my app engine server to java 7. Does anyone know how to fix this problem? java.io.IOException: Failed to retrieve API configs with status: 500 at com.google.api.server.spi.tools.devserver.ApiServlet.getApiConfigSources(ApiServlet.java:102) at com

问题 I am trying to connect to the smartsheet api using a java program. Initially I had problems with the site certificate which was resolved by adding it to the java keystore. Now when I am trying to run my code, I get the following error. Exception in thread "main" java.lang.NoSuchFieldError: INSTANCE at org.apache.http.conn.ssl.SSLConnectionSocketFactory.<clinit>(SSLConnectionSocketFactory.java:144) at org.apache.http.impl.client.HttpClientBuilder.build(HttpClientBuilder.java:955) at org.apache

问题 I'm comparing two variations on a test program. Both are operating with a 4-thread ForkJoinPool on a machine with four cores. In 'mode 1', I use the pool very much like an executor service. I toss a pile of tasks into ExecutorService.invokeAll . I get better performance than from an ordinary fixed thread executor service (even though there are calls to Lucene, that do some I/O, in there). There is no divide-and-conquer here. Literally, I do ExecutorService es = new ForkJoinPool(4); es

问题 i am trying to compile my OSGi bundle against OSGi specification 4.3 using OpenJDK7 but i am getting error: [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5:compile (default-compile) on project example: Compilation failure [ERROR] /tmp/baka/example/src/main/java/org/example/Activator.java:[14,24] error: type ServiceReference does not take parameters here is my Activator.java: package org.example; import org.osgi.framework.BundleActivator; import org.osgi

问题 I've updated Java to version "1.7.0_09-icedtea" (previously it was 1.6) and get the following message: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate be an class [org.springframework.aop.aspectj.AspectJPointcutAdvisor]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: error the @annotation pointcut expression is only supported at Java 5 compliance level or above Application had

问题 I followed the Watching a Directory for Changes Java7 nio2 tutorial to recursively monitor the entire contents of a directory using the code sample WatchDir.java. While this works well on Linux and Mac, on Windows (tested on Vista and 7), trying to delete nested, watched folders using Windows Explorer fails with a message akin to "Access Denied: You need permission to perform this action" when a file exists in one of the nested directories. For example, if I watch a nested folder tree in

问题 Which features of JDK 7 (excluding invokedynamic because it is not used by java) causing a new class file version which is not compliant with JDK 6. It seams that all features could be implemented by compiler generating glue codes. For example String in switch statement could be implemented using repeated ifeq statements generated by the compiler. I want to able to give -source 1.7 -target 1.6 flags to compiler to be compliant with jre 6 and at the same time use project coin features in jdk 7

问题 Disclaimer: I know the basics of signing an APKs and I have a problem with only one of my projects and only when signing with Microsoft Windows as the OS. I am building my APK with Maven and sign them with the maven-jarsigner-plugin: <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jarsigner-plugin</artifactId> <executions> <execution> <id>signing</id> <goals> <goal>sign</goal> </goals> <phase>package</phase> <inherited>true</inherited> <configuration> <archive>target/$

问题 i am using eclipse to develop a web application and i have encountered a problem when i am trying to run my application on server from within eclipse. # # A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x00007f41e4e610b0, pid=3463, tid=139924549404416 # # JRE version: 7.0_09-b05 # Java VM: Java HotSpot(TM) 64-Bit Server VM (23.5-b02 mixed mode linux-amd64 compressed oops) # Problematic frame: # C [libwebkitgtk-1.0.so.0+0x11670b0] void WTF: