Recent questions tagged Java

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I need to load a bunch of words (about 70,000) from a text file, add it to a hashtable (using soundex ... for the situation such as above? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JavaFX, OS X, Graphics Device initialization failed for : es2, sw

I'm trying to create a JavaFX project in IntelliJ IDEA, but I get errors every time. After completing tutorial ... to make my project work? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Changing the icon of a .JAR file

How can I change the icon of a .JAR file I want to distribute? I have changed the icon that shows when the ... , which is not the best choice. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - jvm heap setting pattern

I have observed while setting heap size people prefer the values 64,128,256,1024.. . If I give a value in ... ? Please help me to understand. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Get an image and its position from excel file using Apache POI

Is it possible to extract an image's information from an xls spreadsheet using Apache POI? In one of my ... here get images positions... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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529 views

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java - Android: stopService in another Activity

How can I stop my Service in another Activity? I start the service in my summaryActivity ... Statusactivity the SocketServiceIntent. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android studio v2.2.2 error(27,17) failed to resolve junit:junit4.12

I have searched everywhere for this answer and tried multiple ways to fix this but as I'm new to this IDE I ... to do to these errors? Regards See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Implicit cast to string - toString and int + ""

Why when i use this: int a = 1; methodWithParamString(a + ""); a is cast to String, bu i can't use toString( ... works like: a.toString() + "" ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - contextDestroyed() vs addShutdownHook()

I'm currently implementing ServletContextListener and using contextDestroyed() to run cleanup tasks on my web ... , and maintainability? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to set the default namespace using JAXB

I have a ATOM-XML representation of my data that is returned via a Spring MVC web service. I'm using JAXB to ... in chrome but not in Firefox. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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487 views

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java - NoSuchMethodError: com.google.common.base.Stopwatch.createStarted()Lcom/google/common/base/Stopwatch

My app is throwing NoSuchMethodError: com.google.common.base.Stopwatch.createStarted()Lcom/google/common/base/Stopwatch error. ... ... 74 more See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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776 views

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java - Automatically Trim Trailing White Space for properties in Props file loaded into Spring

I'm using PropertiesFactoryBean to load properties from a typical Properties file. Is there anyway to get Spring to ... from the prop value? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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509 views

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java - How could I have the index of an array 'roll over' when incrementing?

So I have an Array with a length of 4. When I increment it by 1 and the number gets bigger than ... textviewlist.length) % textviewlist.length; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Apache Beam: Unable to find registrar for gs

Beam is using both Google's auto/value and auto/service tools. I want to run a pipeline with Dataflow runner ... class is in the jar. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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353 views

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java - Are upper bounds of indexed ranges always assumed to be exclusive?

So in Java, whenever an indexed range is given, the upper bound is almost always exclusive. From java. ... officially sanctioned over the other? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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594 views

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java - Transaction not active - Hibernate - JPA

I have this class which is dedicated to persist data in db through persistance layer of hibernate. public ... then those of TLinkEquipement See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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338 views

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java - JavaFX: How to make my custom component use all available space from parent layout?

I′m trying to make a custom component to javafx, so I make my class extends javafx.scene.control.Control and on ... wrote to much... =O See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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456 views

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java - Calling super() with no Superclass?

What happens (if anything) when a constructor calls 'super()' without having any superclass besides Object? Like so ... I just delete that line? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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576 views

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java - SimpleDateFormat "Unparseable date" Exception

I am trying to parse datetime string with SimpleDateFormat.parse() but I keep receiving Unparseable date exceptions. Here ... what my issue is? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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412 views

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java - Creating a byte[] from a List<Byte>

What is the most efficient way to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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321 views

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java - why doesn't this synchronized method work as expected?

I have a class called "Account" public class Account { public double balance = 1500; public synchronized ... using synchronized methods... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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361 views

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java - Hibernate upgrade to 5.2 - Session Factory creation and replacing PersistentClass for getting entity class properties

I am currently upgrading my Hibernate version to the latest version 5.2.10. I replaced my code in ... creation mechanism for this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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480 views

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java - GSON: How to move fields to parent object

I'm using Google GSON to transform my Java object to JSON. Currently I'm having the following structure: ... duration object to the JsonWriter. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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455 views

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java - GWT URL Parameters

What is the proper way to use URL parameters? My URL is this: http://localhost:8080/#pg5?testing=abc In my ... 's what getParamerter() was for. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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562 views

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java - How should I record `HttpServletRequest`s that are sent to `doPost` in an `HttpServlet` for later playback?

I want to dump some requests (of type javax.servlet.http.HttpServletRequest) into a file and then later replay them ... how to solve my problem. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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567 views

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java - Set Size of JFace Wizard

I am building an Eclipse RCP application and am having trouble on settings the size of a JFace Wizard. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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473 views

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java - Case-insensitive URLs with JAX-RS

Is there any easy way to provide a case-insensitive URLs in a JAX-RS web service? The goal of this is to ... produce" (can't recall the source) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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545 views

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java - .nextval JDBC insert problem

I try to insert into table with sequence .nextval as primary key, the sql in Java is sql = "INSERT INTO ... of sequence, is this correct? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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