Recent questions tagged java

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java - What is the difference between getText() and getAttribute() in Selenium WebDriver?

Both are used to get the WebElement value in between tags. Is my assumption right? If wrong, please elaborate. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Loop diagonally through two dimensional array

I wrote the following code to walk half the diagonals of an array: String[][] b = [a,b,c] [d,e,f] [g,h,i ... i.e required output: a db gec hf i See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Singleton instantiation

Below show is the creation on the singleton object. public class Map_en_US extends mapTree { private static Map_en_US ... new Map_en_US(); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to clear contents of a jTable ?

I have a jTable and it's got a table model defined like this: javax.swing.table.TableModel dataModel = new ... returns to an empty table ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - using Gson library in GWT client code

I'm currently writing a web application in java using GWT 2.0 in eclipse. I wanted to know if there is a way ... please tell me how... Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Display emoji/emotion icon in Android TextView

I have some problem with displaying emoji icon in Android TextView First, I found a list of emoji icon in ... somebody help me please, thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Install maven plugin in eclipse juno

I am trying to install maven 1.5 in eclipse unfortunately I am getting errors like: Cannot complete the install ... [1.5.0.20140606-0033] See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to check whether the given object is object or Array in JSON string

I am getting JSON string from website. I have data which looks like this (JSON Array) myconf= {URL:[blah,blah]} ... ("URL").length()==0) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Recursively fetch file contents from subdirectories using sc.textFile

It seems that SparkContext textFile expects only files to be present in the given directory location - it ... place for handling directories. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android - Running a background task every 15 minutes, even when application is not running

I need to build a background task that runs every 10/15 minutes (doesn't really matter, either is good), even when ... and how could I do it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How Expensive is Thread.getStackTrace()?

In a logging system, every log output is done by a helper class with a method such as this one public ... it have significant performance hits? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Thread-safe iteration over a collection

We all know when using Collections.synchronizedXXX (e.g. synchronizedSet()) we get a synchronized "view" of ... foreach/Iterable thread-safe? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Does Spring MessageSource Support Multiple Class Path?

I am designing a plugin system for our web based application using Spring framework. Plugins are jars on ... an implementation of MessageSource? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - spring mvc date format with form:input

I have hibernate entity and a bean: @Entity public class GeneralObservation { @DateTimeFormat(pattern = "dd/MM/yyyy") ... /DD/yyyy format? Thanx See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - new Runnable() but no new thread?

I'm trying to understand the code here , specifically the anonymous class private Runnable mUpdateTimeTask = new ... class to postAtTime? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Connecting to Heroku Postgres from Spring Boot

I'm looking for the simplest, cleanest way of connecting to Heroku Postgres in a Spring Boot app using JPA/ ... properties; no XML please)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Renaming Part Files in Hadoop Map Reduce

I have tried to use the MultipleOutputs class as per the example in page http://hadoop.apache.org/docs/mapreduce/ ... Path(myCustomName)); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Unable to use JConsole with Tomcat running as windows service

I am running tomcat 6.0.18 as a windows service. In the service applet the jvm is configured default, i.e. ... seem to pick up the parameter. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to initialize a Servlet during startup with parameters?

Can we write an argument constructor in a Servlet? If yes, how can you call? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Selenium - NoSuchWindowException in IE 11

I am trying to automate a webpage using selenium in IE11. I have set the protected mode settings to same level ... on how to resolve this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What can be done with 'PermGen out of space' exception in Tomcat-Spring-Hibernate web application?

We have an web application that uses Spring-Hibernate to persist registered users data in Oracle database. The application ... how to solve it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What do ‘value semantics’ and ‘pointer semantics’ mean?

What is meant by ‘value semantics’, and what is meant by ‘implicit pointer semantics’? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to print a two dimensional array?

I have a [20][20] two dimensional array that I've manipulated. In a few words I am doing a turtle project with ... () { System.out.println... } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to extract file extension from byte array

I've got bytes array in database. How to extract file extension (mime/type) from byte array in java? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JavaFX 8 HiDPI Support

I just tried out the JavaFX Hello World Example on a 4k screen on Arch Linux, but unfortunately the GUI does ... make my application dpi aware? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Is there a way to deal with duplicate element definitions across multiple .xsd files in JAXB?

I have dozens and dozens .xsd files that I want to auto-generate code for. A couple of the files have ... map them to existing implementations? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Add data to JSONObject

I'm trying to figure out how to add the following data to my json object. Could someone show me how to do ... ); json.put("aoColumnDefs", ); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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366 views

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java - Eclipse issue with Maven build and JDK when generating Qclasses in Querydsl

When I add this code below in my pom.xml to support Querydsl <plugin> <groupId>com.mysema.maven</groupId> ... .7.0_45 PATH : %JAVA_HOME%in; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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