Recent questions tagged Java

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java - How to cast subclass object to superclass object

i have 2 classes, called superclass and subclass, i tried to cast the subclass object to superclass, but its ... method cant found } } 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 - A scroll view can have only one child Android XML file

So, I want to have a scrollview on my layout. I did this and got a scroll view can only have one child : ... still no luck. Any ideas? Thanks. 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 - Adding enum type to a list

If I need to add an enum attribute to a list, how do I declare the list? Let us say the enum class is: ... to be used instead of List<String>? 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 convert array byte to org.w3c.dom.Document

I have a Document (org.w3c.dom.Document), I convert this document to array of byte: private byte[] ... } Any idea? Thansks!!! 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 do I get from the "Event" object the object on which there was this event?

I am developing an application on GWT with UIBinder and I have a problem. In my user interface can be a lot ... How can I solve this 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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java - How to hide the down arrow button on a combobox in javafx?

I have an editable ComboBox and I wish to "hide" the down arrow button so that it looks like a normal textbox. 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 Create a Radio Button Group with PDFBox 2.0

I want to create a Radio Button group using PDFBox 2.0, I am able to create 3 Radio Buttons, but I can ... .pdf")); document.close(); 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 - Need clarification on JMS vs ActiveMQ bean/resource configuration

There appears to be some inconsistency on how to use JMS resources, and setting up activationConfig with proper ... delivery when bean-managed transaction demarcation is used. Its...

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

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java - IntelliJ IDEA showing all maven plugins twice in maven toolbar tree

I have a maven project. Whenever I try to open it in IDEA, all plugins are shown twice in the tree. I ... find any solution. Thanks for help. 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 store JSON file as a JSON datatype in mysql using Hibernate / Spring boot?

I've tried several ways of storing a json file in a database but it ends up creating different columns for ... json type using spring boot. 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 make SonarQube module analyze the project only once when sonar analysis is bound to maven lifecycle in a multi-module project?

What I am trying to achieve is integrate SonarQube analysis into the build process, so that whenever mvn clean ... </executions> </plugin> 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 - Interactive Antlr

I'm trying to write a simple interactive (using System.in as source) language using antlr, and I have a few ... or if not, with something else? 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 - Gmail api scope & format mismatch

I'm trying to write tiny gmail client for android as training. I took gmail api guide sample from ... always set to GmailScopes.GMAIL_METADATA 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 - Divide/split a string on quotation marks

I have the following string: I would "surely" like to "go to school". Now, I would like to split this string ... surely like to go to school . 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 - What are the rules to handle homonym inherited methods?

I'm trying to understand how Java handles cases of ambiguity that come out when a concrete class inherits (abstract or ... {public void foo(){}} 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 the first letter of each word in a string using regex

I'm trying to get the first letter of each word in a string using regex, here is what I have tried: public ... regex to get the correct output? 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 - Stack trace is not printed in proper order with other messages on console

Why does it happen that the stack trace printed for the following Java program is not displayed in a proper ... I apologize for lengthy question See Question&Answers more detail:os...

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

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547 views

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java - Write cyrillic chars into PDF form fields with PDFBox

I am using pdfbox 2.0.5 to fill out form fields of a PDF document using this code: doc = PDDocument.load ... (or asian) characters? Thanks, Ropo 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 - Deprecated richfaces javax.faces.el.MethodBinding replacement use

I found this piece of code works in that i can programmatically creates a richfaces dropdown menu. But ... menuItem.setActionListener( mb ); 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 - Please provide example for an If statement in hibernate criteria

How do you write criteria on if condition using hibernate criteria. My query that needs to be transformed ... statement in hibernate criteria. See Question&Answers more detail:os...

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

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300 views

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java - XIncludeAwareParserConfiguration incompatible with XMLParserConfiguration

I get this error when deploying the ear file on to WLS 10.3 on AIX platform. The same ear works ... .WebAppModule.prepare(WebAppModule.java:345) 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 do I pass a parameter to a JSP via a cross-context JSTL import?

I've come across a few other questions that describe a similar, but not identical situation, to mine. This ... for debugging this one 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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355 views

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java - can we convert integer into character

we can convert character to an integer equivalent to the ASCII value of the same but can we do the reverse thing ... lost of precision error ... 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 draw line over a JFreeChart chart?

I have updatable OHLCChart. I need to draw a line over chart. How to implement it? 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 - getResourceAsStream fails under new environment?

Hallo, i have following line of code: InputStream passoloExportFileInputStream = getClass().getClassLoader().getResourceAsStream ... thank you! See Question&Answers more detail:os...

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

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437 views

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java - Is TLS_RSA_WITH_3DES_EDE_CBC_SHA equivalent to SSL_RSA_WITH_3DES_EDE_CBC_SHA

I am working on configuring a Java client which its job is to make TLS connections to servers. I want to configure my ... *. How can I be sure? See Question&Answers more detail:os...

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

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300 views

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java - is it possible to have multiple instances of static variables

Static variables have only instance (that is they are part of the class). ex: Math.pi Is there any ... is something related to Classloaders? See Question&Answers more detail:os...

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

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392 views

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java - just get the names of USB devices attached to a system?

Aren't there any system calls or OS specific functions that can be called by Java to get just the names of the ... usb, etc on many other posts. See Question&Answers more detail:os...

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

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