Java
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Java – how to generate a unique int from a unique string?
I have a string object with a unique ID How to convert a string to a unique int in the simplest / fastest way? 10X. Ed…… -
Java – spring auto assembly of parameterized collections
Hello everyone, thank you for your help I have a problem that spring cannot automatically assemble parameterized membe…… -
Using Java Exe executes silent mode
I wonder if there is a way to execute "Java. Exe" as a background process (in silent mode) For example: Java - CP. MyC…… -
Add Java packages to GWT
I've tried to search, but I can't figure out how to add my package to the GWT project My tree structure is as follows:…… -
Java – how to make Apache Tomcat accept the delete method
I'm developing a restful web services project. I'm using Apache Tomcat and jax-rs I want to accept the delete request …… -
Java – serialize an object with a non serializable parent class
How does the following code work? class A { int a = 10; } class B extends A implements Serializab…… -
In Java util. Date or Java sql. Select between date
I should use Java util. Date or Java sql. Date？ I have a visual fox database, and I have retrieved entities using the…… -
Java – is it a bad style to use NullPointerException to test null?
I have some code along the following pattern: return a().b().c().d().e(); Now, since each of these methods can return …… -
Java – split screen in libgdx
The question is short and simple How to create split screen effect in libgdx If I create two cameras, it will draw one…… -
Java – factory pattern dynamic method
I'm trying to understand the factory model If there are many implementations, there will be many switch cases in my fa…… -
Java – it makes sense to override the methods in the interface
There is already an answer to this question: > why Java 6 overrides keyset(), entryset() and values() interface in …… -
Avoid checkstyle magic number errors in JDBC queries
I'm having a group project in class. We're trying checkstyle I'm very satisfied with Java, but I've never touched JDBC…… -
. Net and Httpwebrequest are equivalent in Java?
. Net has Httpwebrequest and webclient to simulate browser requests I will Google, but I don't know what keywords to u…… -
[ljava. Lang. object; cannot be discarded
I want to get the value from the database. In my case, I use list to get the value from the database, but I receive th…… -
Java: cloning arbitrary collections by referencing collections
Suppose you have a method of type Java util. Collection, and it can't be said which Java it will point to at run time …… -
Java – why do we have immutable empty maps?
/** /** * Returns the empty map (immutable). This map is serializable. * * <p>This example illustrates the t…… -
Java – WebService call timed out from the client
I am using resteasy client to call WebService One requirement is to abort / timeout the call if the running time excee…… -
Java – how to create a global variable in Android?
See English answers > 12 Android global variables I've tried to put it in a custom class, but the problem is that i…… -
Java – use App Engine to customize the data storage location on the local computer
I am developing App Engine Application in Android studio and testing it on the local computer (using local data store)…… -
Java – why compile code with consecutive semicolons?
According to my scientific Java experiment, int x = 0; Equivalent to int x = 0;; This is equivalent to int x = 0;;;;;;…… -
java. Lang.illegalargumentexception: the observer is null
A user of one of my applications reported this error I'm confused about how to solve what it means After a Google sear…… -
Java – Android support library: getdrawable independent vector or not
When using Android > = 5.0, Drawable d = getResources().getDrawable(R.drawable.icon) Parse the XML correctly and re…… -
Java – anti hacking solution for secret keys in Android applications?
I need to store a private string key in the application Its value never changes and is set manually in the code I can'…… -
Java – cachedrowsetimpl cannot resolve to a type
I am using cachedrowset to save the resultset form dB CachedRowSetImpl crs = new CachedRowSetImpl(); But eclipse remin…… -
Java EE – inject @ EJB beans according to conditions
A novice question: can I inject different beans according to the conditions I set in the properties file This is what …… -
Java – convert bufferedimage to byte without I / o []
Hi, I have a buffered image instance in memory and want to convert it to byte [] to encode it into Base64 string witho…… -
Java – how to programmatically kill a storm topology?
I'm using a Java class to submit a topology to the storm cluster, and I'm also going to use a Java class to kill the t…… -
Java: accessing subclass variables using parent methods
I have the following conditions: public class A { private int x = 5; public void print() { Syste…… -
Java – converts a string to a date using a time zone
I have a string pattern yyyy MM DD HH: mm a I want to convert it to the following format yyyy-MM-dd HH：mm：ss Z What …… -
java. util. What is the runtime of equals() in arrays?
As the title shows, Java util. What is the runtime of equals() in arrays? For example, if you compare two ints [], doe…… -
Is there a way to disable short circuit evaluation in Java?
Say I have this Code: boolean ret = a() && b() && c() && d() && e(); E () is called on…… -
Selenium webdriver works but slow (Java)
I'm using selenium webdriver to capture screenshots of web pages It works well. However, the time from when I run in e……