包含标签：Java 的文章
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Java constructors cannot use varargs
I have the following enumeration, which contains many constructors: public enum Route { HOMEPAGE("",null,UserType.G…… -
Java – bitstamp {“error”: “API key not found”} code response: 200
I tried to send a balance request to bitstamp in Java. I wrote the following code, but I received this error: {"error"…… -
We have a Java correspondent Net “mustinherit” or “not inheritable”?
How do we declare that a class in Java must inherit rather than instantiate directly from itself, or conversely, how d…… -
java. lang.ClassNotFoundException：org. apache. struts. action. ActionServlet
I got a Tomcat error: Sep 09,2012 3:27:48 PM org.apache.catalina.core.AprLifecycleListener init Information: The APR b…… -
How to convert Java long to * unsigned * base-x string (and return)?
[editor] I don't accept any answers involving BigInteger or other similar inefficient methods Please read the question…… -
Java – guava cachebuilder delete listener
Please tell me where I lost it I have a cache built by cachebuilder in datapool Datapool is a singleton object. Its in…… -
Collections in Java better programming practice
I see something similar in most java code that uses collections List<String> list = new ArrayList<String>(…… -
Java – fail fast iterator
I got this definition: as the name implies, once they realize that the structure of the collection has changed since t…… -
Java – add load circle to JTable
I have a JTable to load data from the database Because there is too much data sometimes, I want to add a loading circl…… -
Java – how to protect SQLite dB in Android from theft
I'm making an application for a 28 MB sq Lite file, which was originally in the Android resource folder When it is ins…… -
Java – simplexml enumerations are case sensitive
I've been trying to create XML using the simplexml Library (v2.6.2) The XML I want to create must save the enumeration…… -
Null pointer exception of getter setter in Java
I have one named shareddata Getter setter class of Java When I want to hint at it on my code, I get a null pointer exc…… -
Java – spring MVC relative redirection from httpservletresponse
Given this relative redirection to another controller: @Controller @RequestMapping("/someController") public class MyC…… -
Can I get the properties defined in “gradle. Properties” in Java state?
I'm in gradle A property is defined in the properties file, as follows: user.password=mypassword Can I use it as a var…… -
java – file. Createnewfile() IOException “no such file or directory”
Although java coding has this problem: file Createnewfile() throws IOException "no such file or directory" Check out o…… -
Java – redraws JPanel only after window resizing is complete
I have a JPanel and I draw four rectangles on it Randomly select the color of each of these rectangles The color chang…… -
How does this multithreaded java code work?
In view of this, the Java code: class Account { private Integer number = 0; public synchronized void s…… -
Java – which method in jsoup can return modified HTML?
When I use jsoup to parse HTML files (stored locally) I modified some elements in the HTML file, so I want to save the…… -
Java – how to create an ordered set of objects based on specific fields?
I need to retrieve the sorted object list according to the sorting field; Their collection type is sortedset, but the …… -
Multithreading – thread:: join() prevents it from
To learn how to use atomics in C 11, I tried the following code snippet: #include <iostream> #include <thread…… -
Java – a class that describes immutable ordered sets
I need some class / interface names that describe immutable ordered sets (in input order, such as linkedhashset) Of co…… -
Java – how to draw a border around MapView
I try to draw margins around MapView when I click a button So that's what I've tried. It doesn't work MapView is locat…… -
Why should Java method names not contain underscores?
I am using PMD to check java coding violations public void testCaseMethod_4_2_16(){ //some implementation } Of whi…… -
Numericupdown equivalent in Java
It should be easy, but I didn't find it in Google: In Java Net system Windows. Forms. Does numericupdown have an equiv…… -
Java stream orElseThrow
I want to convert a piece of code from a connection pool project that I've been trying to use streams The original cod…… -
Why Java util. Date represents year as “year-1900”?
In Java util. In date: * In all methods of class <code>Date</code> that accept or return * year,month,dat…… -
Java – moving objects and timers
I have a 500 width and 400 height screen, and I have a vector with a bunch of shapes Suppose the vector has two differ…… -
Java: draw a circular spiral using drawarc
I'm doing a Java programming exercise. We must draw a circular spiral using the drawarc method so that the result look…… -
Java：JOptionPane Radio Buttons
I'm working on a simple program to help me calculate mixed liquid things I tried in joptionpane Radio buttons are adde…… -
Java documentation – @ return and @ param
I want to know how to use @ return and @ param to record code? I guess I'll do something similar @return(whatever the …… -
How do I use this keyword in static methods in Java?
Is there any way to use this keyword in static methods in Java? I want to display toast messages in static methods in …… -
Java – how to add the final integer variable?
Eclipse is providing final, but I can't add the I variable @Override public void onClick(View v) { final TextView ……