java-7

问题 I have one scenario where I am trying to implement with the Java 7 'try with resource' feature. My finally block contains an object of BufferedWriter and File , which I want to close using 'try with resource' feature, instead of closing it by calling close method explicitly. But I checked on net and saw that the File class does not implement the AutoCloseable interface, but BufferedWriter does. So how can I manage this scenario to implement 'try with resource' feature? 回答1: try

问题 first of all I would like to thank you and to explicitly say that I've been slamming my head on this issue for several days and looking for a solution in other similar threads with no success. Our application is responsible of generating java classes and some of them may contain special characters in the class name (thus file name) such as ZoneRéservée435.java forcing the encoding to be UTF-8. Till Java 1.6 the ant task: <javac source="1.5" target="1.5" srcdir="${src.dir}" destdir="$

问题 I recently stumbled on a question that made me stop and think... To me, the code below should always trigger an error, but when one of my colleagues asked me why Eclipse didn't show one, I couldn't answer anything. class A { public static void main(String... args) { System.out.println(new Object() == 0); } } I've investigated and found that with source level 1.6 it indeed throws an error: incomparable types: Object and int But now in 1.7 it compiles ok. Please, what new feature does warrant

问题 I have a resource where i know exactly the types of words. i have to lemmatize them but for correct results, i have to manually tag them. i could not find any code for manual tagging of words. i m using following code but it returns wrong result. i.e "painting" for "painting" where i expect "paint". *//...........lemmatization starts........................ Properties props = new Properties(); props.put("annotators", "tokenize, ssplit, pos, lemma"); StanfordCoreNLP pipeline = new

问题 As I understand from reading this post about the new invokedynamic bytecode instruction in JDK 7, it makes it possible to call methods on the objects which are not statically defined in the object's class and have those method calls be resolved to some concrete static methods in some other class by intercepting the method call target resolution (the post gives an example). Does this mean that Java 7 classes can have implicit methods like Scala has? If not how is implicit method resolution in

问题 All I could find so far is this (open) Sun bug/RFE entry with 426 506 votes: http://bugs.sun.com/view_bug.do?bug_id=6530906 It's in third place in the list of RFEs. Tons of people have stated that it will be included in Java 7...but does anyone have any clear information on whether MiGLayout will be included? Answered Well, it seems Chad has a point - it's not on any official list anywhere, and time is sure ticking away, so unless something big happens, it's safe to say MiGLayout apparently

问题 I want to write a simple Java Desktop Application using Java Swing. Usually I use Spring Framework to do the dependency injection and build the whole class structure. However, I've seen that CDI is becoming more and more popular and want to give it a try. I would like to do the Dependency Injection of my project using CDI, but I don't know if this is possible without a Servlet container (as it is using Spring). Every single tutorial seems to be related with servlet containers or application

问题 I have a private method in an inner class which is private I would like to use the SafeVarargs annotation. However, I am required to either have a static or final method. Why does a private method need to be final as well? Isn't this redundant? 回答1: It is redundant, and you bring up an excellent point. I think the real reason for the requirement of final or static was to force that the method could not be overridden, and thus a subclass couldn't tamper with data in a way that made the

问题 I need to be certain that jce is available even in JRE environments out of the box. After furious googling I only managed to verify that jce comes bundled with the JDK after Java 1.4. Does the jce come bundled with the plain JRE download as well? Could you point out where you found the information, so I can verify for myself and know what I missed? 回答1: yes, the jce is included in all versions of java these days, relevant announcement. 回答2: Have you had a look at $JRE_HOME/lib/jce.jar ? ~$

问题 I searched and couldn't find in which version the TimSort actually replaced the MergeSort in collections.sort() method. If anyone can let me know the exact version for JDK7 it would be a great help. 回答1: TimSort has been used in Java 7 right from the release. To be more specific, it has been added in Java 7, beta 70. It might be worth noting that this is still a modified merge sort, just having more modifications being more efficient than the modified merge sort that has been used in previous