包含标签：Java 的文章
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Java exception handling – style
Historically, I have written my exception handling code: Cursor cursor = null; try { cursor = db.openCurso…… -
Java loop efficiency
I compared the efficiency of nested for, while and do while loops in Java, and I encountered some strange results that…… -
Java – is it OK to have an ’empty’ class that extends another class?
Suppose I have a class foo, which has a pile of logic, and another class bar is basically the same However, since Foo …… -
Java – Eclipse console exception color
This seems simple, but I can't seem to find a setting in eclipse to change it I like my console with dark white text I…… -
Java – how to: access restful web services for beginners using play framework 2.1
Many concepts and techniques I use in this problem are quite new, so I hope to know and help beginners in the communit…… -
Java – what happens to the lost string object
Line 1: String x = "Java"; Line 1: String x = "Java"; Line 2: x.concat(" Rules!"); Line 3: System.out.println("x = " +…… -
Java – how to capture window minimization events?
I want to create a JFrame instance and click the minimize button. I want to hide it in the system tray, usually the wi…… -
Java – NoClassDefFoundError is running a valid jar (compiled with dependencies), although it has common httpclient and httpcomponents dependencies in POM
I tried to automate a simple user behavior by using selenium webdriver under the main method (not under test) "Excepti…… -
Java – Jersey rest server: instantiating resource classes
The tutorial on Jersey rest server [1] said to Jersey small server: When the servlet "selects the correct class and me…… -
Java – transformation 2.0b2: how to get InputStream from response?
I'm using retrofit 2.0b2 After getting the response, I try to get an InputStream from the response: Response<JsonNo…… -
Java – what is using atomicreferencearray?
When is it a good idea to use atomicreferencearray? Please give an example Solution It seems to be functionally equiva…… -
Java – the correct way to configure logs in wildfly 8.2
I'm setting up wildfly-8.2 0's log was confused Initially, I used my own log system, with log4j built into the war fil…… -
Java – what is the purpose of using final for loop variables in an enhanced for loop?
I understand how the following statement works for(final Animal animal : animalList){ //do some function } But what is…… -
Enable MySQL general query log using JDBC
Is there any way to enable MySQL general query records through JDBC? The closest thing I found through my search was t…… -
GWT test error NoClassDefFoundError: COM / Google / GWT / dev / CFG / condition
Maybe someone can help me. I try to write my first GWT unit test, but this is the problem. When I run my test with mav…… -
Java – Android home screen shortcut permission error
In my program, it adds shortcuts to the screen I get the icon on the screen, but when I click it, I get: 03-01 20:00:2…… -
Java: use decimalformat to format doubles and integers, but keep integers without decimal separator
I tried to format some numbers in a java program Numbers will be double and integer When dealing with double precision…… -
Java – I need to know how Haskell represents data and can write a good Haskell program?
I'm learning Haskell from a Java background When I program java, I think I know very well how objects are arranged in …… -
Java – real ORM: how to handle maps?
I'm creating an Android application. I need to persist map < string, MyClass > Solution As you've noticed, real …… -
java – Resources. Openrawresource () releases Android
I have a database file in RES / raw / folder I'm calling resources Openrawresource(), the file name is r.raw Filename,…… -
SIGTERM is not received by the java process using ‘docker stop’ and the official JAVA image
I use Debian / Jessie based image Java: 7u79 to run the dropwizard Java application in the docker container My java ap…… -
Java – file path / name from InputStream
How do I get the file path / name from InputStream in Java? Solution It's impossible. (not FileInputStream in Java API…… -
Import javax servlet. Annotation cannot be resolved
I tried to create a servlet for my project, but I encountered import javax servlet. Annotation cannot be resolved I ha…… -
Java – JPA @ elementcollection list specifies the connection column name
I have the following entities: @Entity public class Shirt implements Serializable { @Id @Size(max=9) priv…… -
Java – convert local time to UTC time considering daylight saving time and vice versa
I know how to convert local time to UTC time and vice versa Anyone can answer the following questions: 1 When converti…… -
Java – JTable – press tab to put the cell into edit mode
There may be a trivial solution, but I'm already at the end of my tether, so I hope someone can help I use a JTable wi…… -
Java regex: matches (pattern, value) returns true, but group () cannot match
I have a strange problem with regular expressions in Java I tested my regular expression and my value here, how it wor…… -
Javac: invalid target version: 1.8 on MAC when Maven command is executed
I'm running automated tests on the Mac I installed Maven and Java, JDK as follows: java version "1.8.0_25" Java(TM) SE…… -
“Add to set” returns a Boolean value in Java – how about Python?
In Java, I like to use the Boolean value returned by the "add to collection" operation to test whether the element alr…… -
[in java.lang.string; cannot be cast to java.lang.string
I'm getting vector from the product's API Vector<?> dataVector = dataAPI.getReturnVector(); The expected vector …… -
Java – how to get a class literal from a general specific class
Such a method requires class text as a parameter Collection<EmpInfo> emps = SomesqlUtil.select( EmpInfo.…… -
Make the Java program return value to call the shell script
UNIX master! I have a java program that passes some parameters to a servlet The servlet inputs the information into a ……