包含标签：Java 的文章
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Java – how to implement XMPP to send push notifications
I want to use XMPP so that my app will send updates to Android phones (1.5 and later) I'd like to use XMPP to send pus…… -
Java – how to unit test a class that implements runnable
I have a class that implements the runnable interface, examplethread public class ExampleThread implements Runnable { …… -
Where are arrays stored in memory?
If I have a function in which I declare: Object arr[] = new Object[20]; Where are the ARR and the entire array stored?…… -
Multithreading – what is the point of cache consistency?
Is it useful from a practical point of view to provide cache consistency on CPUs like x86? I understand that the idea …… -
Exception in thread “main” Java Lang. outofmemoryerror: GC overhead limit exceeded in GWT application
I am developing applications using GWT and gae When I try to rebuild it or create an artifact, I get a lot of errors a…… -
Java – gets the number of specific elements in the list
I'm looking for a quick way to find the number of list elements as a specific element: List<String> list = new A…… -
Java: what are ioexceptions in BufferedReader’s readline()?
I can "fix" the following exception with a try catch loop, but I can't understand the reason >Why does the "in. Rea…… -
Test whether the font is first-class in Java
I'm listing all the constant width fonts available on the user's machine I can get all fonts in swing in the following…… -
How to view the status of check boxes in the Java GUI?
I have about 200 check boxes in the Java GUI Now I want to list all the checkboxes that the user has checked I can do …… -
Memory – multithreaded heap management
In C / C + +, I can allocate memory in one thread and delete it in another thread However, as long as someone requests…… -
Java – automatically call superclass methods
Consider class class A{ public void init(){ //do this first; } public void atEnd()…… -
Java – distinguish between string args [] and string [] args
I've seen two different ways to declare a string array, but I don't show any difference Anyone can explain the differe…… -
Java – use interface classes as keys to get specific instance values?
I have the following test cases and can't retrieve values from the map: package tests; import java.util.HashMap; impo…… -
Java – use Apache POI to make columns read-only
I am using Apache POI to generate Excel files I need to make column 4 read-only, and the other 2 columns will be edite…… -
JavaFX: how to connect two nodes in a row?
I want to connect two nodes (from the center of the first to the center of the second) with a line Initial ideas: Supp…… -
Java Swing button color
See the English answer > how to set background color of a button in Java GUI? 7 Now my next stage is to add color t…… -
Java – the broadcastreceiver did not receive the action of completing the download
I'm trying to capture download completion events, but my broadcastreceiver doesn't receive them This is the receiver: …… -
Java: force two-way linked objects
I design a game engine in Java The core of this engine is that there are two types of assets and attributes, among whi…… -
Java – spring boot extends crudrepository
I'm at @ L_ 301_ 0 @ use hibernate in boot application I am creating a new crudrepository for all my model objects to …… -
Conditionally remove Java methods at compile time
I'm trying to implement something like a c# preprocessor I know that Java does not have the same preprocessor function…… -
Java – cannot send a multipart / mixed request to pop up MVC based rest services
I have a spring MVC and resteasy rest service. I need to test it by sending multipart / mixed requests The service cod…… -
Java – how do I sign Mac OS X applications in Linux?
For OS X, I distribute Java applications to DMG Due to the release of mountain lion, the following error message will …… -
Java – the difference between enumeration and enumeration
There is no difference between enumeration data types and enumeration interfaces I became confused between the two I g…… -
Java – how to call the functions of the main activities from a custom arrayadapter?
I've seen a lot of similar problems and don't seem to have any work I have a main class of such functions, edit, displ…… -
Java – how to represent the type parameters of general polymorphic static methods in jshell?
In pure Java, I can write class P { static <A> A id (A x) { return x; } static int y = P.<Integer>…… -
Java – too much parameter code in a factory constructor?
I have a factory class that currently has six parameters in its constructor. I just need to add another one Usually, i…… -
How to use java to detect the current display?
I have 2 monitors connected, so I can launch my java application on the primary or secondary monitor The question is: …… -
Java – differences between JDBC
What is the main difference between spring JDBC and JDBC? Solution Let me look at a simple example of using JDBC: fina…… -
Java – simpledateformat parse (string STR) will not throw an exception when STR = 2011 / 12 / 12aaa?
Here is an example: public MyDate() throws ParseException { SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/d…… -
You can use Java util. Is logging configured to use compressed log files?
Can I configure Java util. Logging to compress the log file when it "scrolls" to a new log file? For example, an excer…… -
What is the difference between pointers and reference variables in Java?
My java book explains that to use objects, we can assign them to reference variables How is it different from a pointe…… -
Java – Eclipse JSP – no color, code completion and error detection
I tried to find a way to have color and code completion and error detection in JSP pages I have Eclipse Java EE IDE fo……