包含标签：Java 的文章
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Java – what is the best practice when implementing equals () with entities that generate IDS?
If I have a table a, B, C, D Now, if I'm going to create a business object based on this table (for example, in Java),…… -
Java – weave yourself into a corner
We have a set of classes derived from a set of common interfaces IFoo-> BasicFoo,ReverseFoo,ForwardFoo IBar -> U…… -
Java – can I register a receiver in a test case?
I want to test whether the alarm programmed with AlarmManager is triggered in the unit test. If so, it will be trigger…… -
Java – how to call super (…) and this (…) in the case of overloaded constructors?
I never needed to do this before, but since both must be the "first line" in the constructor, what should I do with it…… -
java – Cron Job in play framework 2.0
How to schedule tasks in play framework 2.0 through cron expressions? Equivalent to @ on ("< enter cron expression …… -
Java – the usual hibernate performance trap
We have just finished configuring our application She's starting to slow down This is a legacy mapping Who works, do t…… -
Do a “memory dump” Java application?
I have Java applications that unfortunately start consuming considerable memory after a period of time To complicate t…… -
Java – where do I sort?
I have a database, I query, I don't know where to perform the sorting of results, so far, I have the following options…… -
Reflection – Java 8 – invalid constant type
I have a problem with the reflections library Dependency and in POM Build in XML <dependency> <groupI…… -
How to eliminate the gap between large Java Swing Tags
In my application, I have a label with a font size of more than 200 This label contains large up and down (irregular) …… -
Java – configure spring security to use custompasswordauthenticationfilter
I have implemented my own lowercaseusernamepasswordauthenticationfilter, which is just a subclass of usernamepassworda…… -
Java: socket read timeout exception
I tried to call a very heavy process When I execute this process, I set a ridiculously large number of timeout times: …… -
Java syntax sugar
I came across this code block today. I don't know how it works I know how to do anonymous classes, but I'm used to see…… -
Java – how to convert string arrays to objects using gson / JSON?
I have a JSON like this: [ [ "Passport Number","NATIONALITY","REASONS" ],[ "SHAIS100","INDIA","" ],[ …… -
Can I use two Java classes with the same name and the same package?
Can I import and use two different classes with the same name and package in Java? For example, suppose I have two cla…… -
Java – how to use in Net?
Lucene is a good search engine, but Net version is the official JAVA version (the latest stable. Net version is 2.0, b…… -
Java – spring boot swagger custom swagger UI html
I encountered a problem migrating the war application to the spring boot jar application I am using spring boot 1.4 1 …… -
Calculate the distance between two vectors of different lengths
There are different ways to calculate the distance between two vectors of the same length: Euclid, Manhattan, Hamming …… -
Java – change the child order of SWT composite
In my case, I have two sashform children, but the problem applies to all composites class MainWindow { Sashform sa…… -
Should spring management be “everything” in Java – spring applications?
We are developing a new application and we want to use spring (University project!) When writing a new spring applicat…… -
Java execution process – Rewriting methods execute first than constructors
I have the following code in the same java file import javax.swing.SwingUtilities; import java.io.File; public class …… -
Java – where does velocity search for templates?
I need to use velocity from Java code in my web application (I use it as a mail template processor) So I have a standa…… -
Java – use bitwise and in if statements
In C, I can write an IF statement if (firstInt & 1) But when I try to perform the same operation in Java, the comp…… -
What is the meaning of the question mark in angle brackets? Extend Java lang.Comparable>
In the App Engine, according to the Javadoc, the gettyperank method has this signature: public static int getTypeRank(…… -
Java – how to print a long type value using the input size modifier?
This is basically what I want to do // ... some code,calculations,what have you ... long timeToAdd = returnTimeToAddIn…… -
Connect some in Java Txt file [closed]
I have some Txt file I want to connect them and generate a text file How will I execute in Java? file1.txt file2.txt C…… -
Why is timeunit Java util. Members of concurrent?
Java's timeunit enumeration is useful for many different tasks related to time, not just concurrency; And other time r…… -
Get string size in Java (no graphics object available)
I'm trying to write an application that needs to draw many strings using the graphics2d class in Java I need to get th…… -
Java – code object o = true? New integer (0): new long (1) returns long with a value of 0 Why?
See the English answer > java conditional operator?: Result type5 Object obj = true ? new Integer(0) : new Long(1);…… -
How to get datasource or connection from JPA2 entitymanager in Java EE 6
I have a working application that I use Java EE 6 with eclipse link persistence and a PostgreSQL database For user reg…… -
Java – JPA onetoone bidirectional
I have two entity classes with @ onetoone relationships The example code is as follows: public class A { @Id private i…… -
Java – how to redirect AWS SDK log output
Even if I'm using logback and configuring it, I keep getting stdout I can't get AWS out of the console Jun 19,2014 3:4……