Recent questions tagged Java

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java - How to count number of JCheckboxes checked?

I have 11 different checkboxes in my JFrame and want to be able to get a number whenever one is checked for ... syntax is not correct right now. See Question&Answers more detail:os...

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

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750 views

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java - Resize JavaFX tab when double click

I have this simple example with JavaFX tabs: public class test extends Application { private BorderPane root; // ... click on the tab name? 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 - JAR vs WAR file specification

I noticed that WAR files are supposed to have classes/ and lib/ directories for containing their classfile root and ... not "getting" here?!? 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 - InputStream.available() doesn't work

I am trying to use inputstream.available () to check if there is any data to read without blocking the thread. but it ... ); slept += 500; } } 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 - More than one JPanel in a Frame / having a brackground Image and another Layer with Components on the top

I've got a JFrame with a JPanel in which there is a JLabel with an ImageIcon(). Everything's working perfectly ... ); window.setVisible(true); } See Question&Answers more detail:os...

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

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838 views

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java - Android Data Binding NoSuchMethodError

I'm not able to setup my project to use Android Data Binding. This is my build.gradle: apply plugin: ' ... } Since I'm using AndroidAnnotations. 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 configure javadb in eclipse(part2)?

this is the continuation of my previous question How to configure javadb in eclipse?. I was able to made some changes ... .getMessage()); } } } 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 - SharedPreferences being reset after force close

I have been able to successfully implement Shared Preferences into my application but I have ran into a problem with ... on this would be great! See Question&Answers more detail:os...

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

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674 views

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java - Photo don't uploaded correctly GCS App Engine

I'm working on my upload.java servlet to store .jpg to GCS. I use GCS client library instead of Google ... getEntity(); Thanks in advance ! 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 add text to each face of a box [JavaFX]

I create a box which I can rotate and what will do ~some action~ when clicked. The problem I'm ... any assistance would be greatly appreciated. See Question&Answers more detail:os...

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

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858 views

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java - Decimal Conversion error

I am writing a program that will convert octal numbers to decimals. It compiles right and everything but there ... what collects the int octal; See Question&Answers more detail:os...

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

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951 views

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java - Android Studio Installation BUG

From yesterday i am having problems while installing android studio on my new SSD disc. I ... android/repository/android_m2repository_r47.zip See Question&Answers more detail:os...

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

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767 views

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java - Do I need resource server with Spring Security OAuth2?

I am trying implement OAuth2 authentication with JWT tokens. If I understand, I need send credentials to ... authentication for my website. See Question&Answers more detail:os...

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

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733 views

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java - Use a variable within a variable?

I have several fields, each one is like this: field1 field2 field3 ... Using a loop with a counter, I ... be given values. Is fieldx possible? See Question&Answers more detail:os...

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

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824 views

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java - ClassFormatError: 56 while using hessian in j2me

I am trying to use the hessian j2me implementation @ http://hessian.caucho.com/ using java me sdk 3.0. http ... why this could be happening ? See Question&Answers more detail:os...

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

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797 views

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java - Was my Jar double clicked, or launched from the command line?

My Jar file supports both being clicked, and launched from the command line. I will only display the GUI if ... double clicked the .jar file? See Question&Answers more detail:os...

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

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817 views

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java - Debug exceptions in AWT queue thread

I am developing a Swing application with a component performing custom painting. When I make some mistake in the ... hence the Java tag). See Question&Answers more detail:os...

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

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769 views

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java - In Swing, is there a way to extract a predefined mouse cursor Image from the toolkit?

I'd like to make a custom help cursor by "badging" the built-in default mouse cursor with a question mark when ... clearly as a question-mark.) See Question&Answers more detail:os...

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

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861 views

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java - How do I fetch specific bytes from a file knowing the offset and length?

I have a file, and the first 4 bytes of the file are the magic such as LOL . How would I be able to ... anyone see any way to solve this issue? See Question&Answers more detail:os...

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

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761 views

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java - Grails rendering plugin css issue

I've just installed grails rendering plugin and would like to use it for generating PDF files. I've created simple ... link to a css file? See Question&Answers more detail:os...

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

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684 views

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java - Programmatically edit TreeView/TreeItem

Edit #2: Since it looks like a bug i already posted a bug report in the javaFx-jira. You have to have ... File and the "problematic" controller. See Question&Answers more detail:os...

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

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894 views

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java - Joda DateTime: Parse date with "CEST" in string

I want to parse a DateTime using the joda library (in scala, but should be the same with java). The source looks ... I don't want to ignore 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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966 views

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java - How do i find and count duplicates in a 2 dimensional array?

Hi I am trying to go through a two-dimensional array (specifically a 4x4 array) and both find any numbers that ... , and a few other things. See Question&Answers more detail:os...

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

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1.1k views

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java - Get TableSchema from BigQuery result PCollection<TableRow>

When I run a query in BigQuery Web UI, the results are displayed in a table where both name and type of ... Any help would be appreciated :) See Question&Answers more detail:os...

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

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663 views

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java - What are EditorKits in JTextComponents and what is their job?

I'm studying about the structure of text components in Swing programs. As far as I understand, JTextComponent is ... Thank you for your 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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851 views

1 answer

java - How to implement bullet points in a JTextPane?

I have a JTextPane with a StyledDocument and RTFEditorKit implemented. How can I add bullet points (preferrably multi ... ) onto the JTextPane? See Question&Answers more detail:os...

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

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798 views

1 answer

java - why a Socket is not instanceof Closeable at runtime?

In an Android app, I added this code to onCreate() Closeable sss = new Socket(); if ... IncompatibleClassChangeError: interface not implemented. See Question&Answers more detail:os...

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

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863 views

1 answer

java - Xpages - Get number of active sessions (Lotus Domino 8.5.2)

How do I get the number of active sessions in Xpage. I'm trying to use managed beans but it just returns a ... Please help me. Thanks a lot! See Question&Answers more detail:os...

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

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