java-7

问题 I tried to deploy a Play app to Cloudbees (only via push to git repo from which it is built by jenkins), it compiled and should work but I get a "502 Bad Gateway" error when loading the app. There is no error shown in the console only that it answers "502 Bad Gateway" when trying to access it. But that's what I see in the browser, too. Cloudbees say that there is no other manipulation necessary, just cloning/pulling the ClickStart-Project, making it you application and pushing it back. The

问题 I want to create a symlink in RHEL 5 using Java. In java6 createSymbolicLink have only two parameters. But in case of Java7 FileAttribute has been included along with the parameters, ie a total of three parameters. public static Path createSymbolicLink(Path link, Path target, FileAttribute... attrs) throws IOException Creates a symbolic link to a target (optional operation). The target parameter is the target of the link. It may be an absolute or relative path and may not exist. When the

问题 In my ant file, I scp a java war file to a test server. As soon as I switched over to java 1.7, due to project requirements, the ant file is throwing a permission denied error: BUILD FAILED C:\Users\jdoe\Documents\code\build2\projectName\build.xml:72: com.jcraf t.jsch.JSchException: java.net.SocketException: Permission denied: connect at com.jcraft.jsch.Util.createSocket(Util.java:344) at com.jcraft.jsch.Session.connect(Session.java:194) at com.jcraft.jsch.Session.connect(Session.java:162) at

问题 When we use javac option: -source and -target how does the compiler "knows" the code to produce ? I mean how does any compiler knows the specification of any previous java release or I have to do some setting in order to provide it with some information about them ? 回答1: The javac program knows how to handle these arguments without you providing any extra information. Do note that there is a bit of a trap here, however: these options relate to the source syntax and the class file form and

问题 When we use javac option: -source and -target how does the compiler "knows" the code to produce ? I mean how does any compiler knows the specification of any previous java release or I have to do some setting in order to provide it with some information about them ? 回答1: The javac program knows how to handle these arguments without you providing any extra information. Do note that there is a bit of a trap here, however: these options relate to the source syntax and the class file form and

问题 Install4j v5.1.6: Creating Media File type "Mac OSX Single Bundle" bundled with Java 1.7 JRE (Java 1.7u45) causes the following error displayed when the Install File is launched: "You need at least a 1.7 Java Virtual Machine to install [my app name]. Please download it from http://www.apple.com" Works fine if I bundle without JRE by selecting in the Media Wizard JRE step: "Installed OpenJDK JRE (Java 7 and higher)", but I need app bundled with a JRE. Install File launched on OSX version 10.7

问题 I am comparing the start Date of a treatement to its End to check if it lasts more than 6 months. If the period doesn't include the month of February all is good but if I compare the 1st of January to the 30th of June, it throws my Exception. To compare both periods I add 6 months to the start Date and compare the result to the end Date like so: Date start = new Date(2017,1,1); Date end = new Date(2017,6,30); Calendar startOfTreatment = new Calendar.getInstance(); startOfTreatment.setTime

问题 I have a function that serially (single-threaded-ly) iterates through a directory of files, changing all tab indentation to three-space indentation. I'm using it as my first attempt at multi-threading. (Am most of the way through Java Concurrency in Practice...surprised it's eight years old now.) In order to keep it's current single-threaded functionality, but add in the additional possibility of multi-threading, I'm thinking of changing the function to accept an additional Executor parameter

问题 After Java 7 to 8 migration, your project may exhibit an increased 500 error rate and you may see this error: Uncaught exception from servlet java.lang.OutOfMemoryError: Java heap space 回答1: Each application running in the standard environment on Google App Engine has an instance class, which determines its compute resources. A B2 instance class (or below) may no longer big enough and we recommend upgrading to a B4 instance. For more information on instance classes, see https://cloud.google

问题 I'm working on a project that checks an email list that is imported to see if the user is registered or not on yahoo. When I click on the Start button, it should go to the yahoo mail sign up page and check every email on this imported txt file. I've relied on htmlunit library but it always gives an exception, despite disabling the JavaScript and ThrowExceptionOnScriptError this the exceptions always happens Exception in thread "AWT-EventQueue-0" ======= EXCEPTION START ======== EcmaError: