Java
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Logical solution algorithm (applicable to Sudoku in Java)
I have a problem with my logic algorithm It solves the problem of a large number of hints, which is only a problem wit…… -
Java – can jmenubar be added to the decoration window of JFrame?
I want to know if I can add jmenubar to the decoration window of JFrame or jrootpane, or if I can include the border i…… -
Java – used to define the disadvantages of non static recorders
How do you reduce Java logging boilerplate code? It is strongly recommended not to use recorders as instance member va…… -
Maintain the map (Collection) of inserted orders in Java
I need to use maps for Android Application in Java But the problem is that the list is sorted automatically How to use…… -
Java – partial JSON serialization at runtime (for restful queries)
I'm trying to convert Java objects in Tomcat to JSON (currently using Jackson) Based on the fields in the restful requ…… -
Java – warn: failed to register destroy callback
This warning message appears a lot in my log For each managed bean, as long as it expires After the given time, becaus…… -
Java – convert a for loop to a concat string of a lambda expression
I have the following for loop to traverse a string list and store the first character of each word in StringBuilder I …… -
Java – why is “multiplexing, non blocking I / O, […] more scalable than thread oriented, blocking I / O”?
I was reading the channel in the JDK 7 document (here) and came across: Is there a simple explanation why? Solution "B…… -
Java – is the root cause of log4jlogger missing or unavailable?
I have commons - logging in the classpath Jar (v1.0.4) and log4j-1.2 8. Jar and get the following runtime error: Cause…… -
Java – is the first element of an array returned using split always safe?
I'm sure the answer is yes, but I just want to make sure that no non empty string (whatever it contains) will return a…… -
Java – mockito – a method that stores the object returned by the mock object method
Suppose I have a mock object. I don't want to stub any of its methods, but I want to store a method of the returned ob…… -
Java – in Net?
I want to know what's going on here Net, but Java doesn't have much experience I think applets can be compared with Si…… -
Will an assertion error be found in the catch block of the Java exception?
Code:- try { Assert.assertEquals("1","2"); } catch (Exception e) { System.out.println("I am in error block"); …… -
Java – what is “VM recurring task thread”?
I can see this thread in my thread dump: "VM Periodic Task Thread" prio=10 tid=0x00007fc23000e800 nid=0x49e6 waiting o…… -
Package private scope in scala visible in Java
When I used the bytecode generated by Scala code from Java code, I just found the strange behavior of scala scope Cons…… -
Extend a Java ArrayList
I want to extend ArrayList to add several methods for a specific class, and its examples will be saved by the extended…… -
Vector creation and VEC! Macros contain different capacities
I have a vectormatrix_ a. It contains three vectors and is initialized with VEC! Macro Because VEC:: with_ Capacity (D…… -
Java EE – multiple response HTTP states in spring MVC
With the following codes: @RequestMapping(value = "/system/login",method = RequestMethod.GET) public void login(@Requ…… -
What is the smallest Java Web MVC framework?
I am looking for a java web framework that requires minimal configuration for a very small application Struts is defin…… -
Java URL protocol: classpath: /?
I see some spring code that uses the classpath: / some / path / to / resource URL protocol to read configuration files…… -
Find a good tutorial on how to develop OData services in Java (with restlet, Jersey or odata4j)
I am looking for a tutorial that shows how to develop an OData service using Java Solution The odata4j document on dep…… -
Java: why is there no warning when referencing a field before defining it?
Static fields cannot be referenced until defined or initialized: static Integer j = i; /* compile error */ static fina…… -
Java – write a method to replace all spaces in a string
I have a question about programming, starting with gayl laakmann McDowell's "cracking the code interview" in the fifth…… -
Java 8 lambda api
I'm trying to migrate from RX java to Java 8 Lambdas An example I can't find is the method of buffering requests For e…… -
java – Optional. Ofnullable and method links
I'm interested in optional The ofnullable method surprised me One day I wrote a function that should return an optiona…… -
Java – getters / setters of classes with maps
What are the best practices for implementing / providing getters / setters for courses with maps? The most common impl…… -
Java – get the Maven version of the project programmatically
How do I programmatically get the Maven version of my project? To put it another way: static public String getVersion(…… -
Java uses POI to read ppt files and poi to read excel and word examples
Apache's POI project can be used to process MS office documents, and there is another one on codeplex Net version. POI…… -
Use example of JSON parsing class library of Java
Open source project home page: https://github.com/dongfangshangren/Zson -
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Java implements the tool class of importing data from excel
The tool class for importing Excel data calls only a few lines of code, which is very simple. -
Java button control array to realize calculator interface example sharing
The idea is as follows: Create a class and make it inherit the form class JFrame through extensions; Create a JFrame o……