Recent questions tagged java

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java - Problems with making a query when using Enum in entity

I have the following in a Question entity: @NamedQuery(name = "Question.allApproved", query = "SELECT q FROM Question q ... ) How do I fix 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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java - Android Room @Delete with parameters

I know I can't use DELETE in a query (that is a shame by the way), I will get the following error: < ... I delete a specific row by a parameter? 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 a file's directory using the File object?

Consider the code: File file = new File("c:\temp\java\testfile"); testfile is a file, and it may or may not ... . How do I go about doing 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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java - returning a Void object

What is the correct way to return a Void type, when it isn't a primitive? Eg. I currently use null as below. ... / do something return null; } } 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 implement a custom String sequence identifier generator with Hibernate

I'm using hibernate with spring, h2 and liquibase and I'm trying to make a custom String id generator for my ... anyone can help me, 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 - Android ICMP ping

Is there a way to ping a host (standard Android or via NDK implementation), and get detailed info on the response? ... can't find any... 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 - How to differentiate between logout and session expired?

Case 1: Log out : Once we log out, if one tries to access previous, it must automatically redirect ... invalidating session when logging out. 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 - getting javax.net.ssl.SSLException: Received fatal alert: protocol_version while scraping data using Jsoup

I am trying to get data from a site using Jsoup. Link to the site is Click here! Here is my code to ... suggest me what is my mistake 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 - Sqlite on Android: How to create a sqlite dist db function - to be used in the app for distance calculation using lat, long

We are building an Android App that will use user's current location (lat, long) and show top 50 venues ... iPhone App - using Objective C. 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 - Builds failing after upgrading to Java7, Missing Tools.jar and bad class versions

I recently upgraded to Java7 on my Macbook Pro. I downloaded the JDK (not the JRE). ? javac version javac 1.7. ... wheel 1462 2 Mar 02:13 bin 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 display JasperReports Viewer inside a JPanel/JFrame..?

I'm a newbie in using JasperReports. In my Swing application I want to show JRViewer inside a JPanel or JFrame. Can anyone help me out? 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 - Issues receiving in RXTX

I've been using RXTX for about a year now, without too many problems. I just started a new program to ... Send DTR - Data Terminal Ready 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 write text on an image

I can do this in Objective-C on the iPhone, but now I'm looking for the equivalent Android Java code. I can ... and write text to it using Java? See Question&Answers more detail:os...

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

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435 views

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java - Need solution for wrong IV length in AES

I'm trying to implement AES in Java and this is the code I use: byte[] sessionKey = {00000000000000000000000000000000 ... AES? Is there any way? See Question&Answers more detail:os...

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

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194 views

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java - SSL Handshaking Using Self-Signed Certs and SSLEngine (JSSE)

I have been tasked to implement a custom/standalone Java webserver that can process SSL and non-SSL messages on ... wrong. 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 extract bold text from pdf using pdfbox?

I am using a Apache pdfbox for extracting text. I can extract the text from pdf but I dont know how to ... st = stripper.getText(document); See Question&Answers more detail:os...

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

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298 views

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java - Why jsp files inside WEB-INF folder works , but placed under a folder under WEB-INF doesn't?

When my jsp files are inside WEB-INF folder (as /WEB-INF/file.jsp) , I can access them from localhost: 8080/ ... /jsp/search. Why is it so? See Question&Answers more detail:os...

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

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190 views

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java - Working on Creating Image Gallery in JavaFX. not able to display image properly

I am creating image gallery using javafx. I found many things on internet regarding this but not able to get any ... by one as thumbnail view. 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 target different Android architectures?

I am currently using the OpenCV (OpenCV4Android) library which does not use the NDK (there is no C ... target different Android architectures? 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 insert multiple rows into database using hibernate?

I'm looping list and inserting into database , but its getting updating records one by one.finally i'm ... the multiple rows into database. See Question&Answers more detail:os...

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

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322 views

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java - How to use Bouncy Castle lightweight API with AES and PBE

I have a block of ciphertext that was created using the JCE algorithim "PBEWithSHA256And256BitAES-CBC-BC". The ... ); return decryptedBytes; } 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 - SoftReference gets garbage collected too early

I'm on my way with implementing a caching mechanism for my Android application. I use SoftReference, like many ... there any working solution? 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 - Creating a ClassLoader to load a JAR file from a byte array

I'm looking to write a custom class loader that will load a JAR file from across a custom network. In the ... a class is loaded, please share! 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 Tell Eclipse to Include Standard .jar Library for All Projects

I realize that in eclipse you can specify certain .jar libraries to add for individual projects, but I was ... s stdlib for all projects. 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 - Wait for element - WebDriver - PageObject pattern

As long as I use PageObject pattern I wondered where should I wait for element on dynamic pages. Assuming we ... which is in PageObject.class? 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 can I visualize jar (not plugin) dependencies?

I am currently refactoring a large Java application. I have split up one of the central (Eclipse) projects into about ... for all of the trees. See Question&Answers more detail:os...

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

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172 views

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java - Tomcat and JDBC connection pooling

I am trying to set up connection pooling to mysql databe with tomcat. My simple app is called Projekt, in my ... all my fault at the end. See Question&Answers more detail:os...

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

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582 views

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java - Android Studio / Intellij, Gradle Error:Cause: peer not authenticated

Having a fight with IntelliJ at the moment. The darn thing won't download Gradle 2.1 I have an Android project ... help me wise SO guru's! See Question&Answers more detail:os...

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

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