Recent questions tagged Java

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java - Difference of two Joda LocalDateTimes

I've got 2 Joda LocalDateTime objects and need to produce a 3rd that represents the difference between them: ... format. 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 - What GUI should I run with JUnit(similar to NUnit gui)

What GUI should use to run my JUnit tests, and how exactly do I do that? My entire background is in .NET, ... see the results of those tests. 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 - Validate every field in a single pass with SuperCSV

I'm trying to write a large number of rows (~2 million) from a database to a CSV file using SuperCSV. I ... next.execute(value, context); } } 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 - Draw text with graphics object on JFrame

I am an avid programmer but today is my first Java lesson. public void Paint (Graphics g) { if(g ... be paint. I apologize profusely. 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 resolve relative url with Jsoup?

Hi I have a problem with Jsoup. I scrape a page and get a lot of urls. Some of those are relative urls like ... absurl("href"), but not working. 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 - Spring Boot jdbc datasource autoconfiguration fails on standalone tomcat

While trying to deploy and start a spring boot application on a standalone ... ) EmbeddedServletContainerAutoConfiguration.EmbeddedJetty - required @ConditionalOnClass classe...

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

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java - How to find the package name given a class name?

Given a class name as a string, how do I get the package name of it at run time ? I do not have the ... java.lang.Class.forName(Class.java:169) 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 recyclerview scroll to top

This is my onCreate that handles the adapter, LinearLayoutManager and etc. I tried every single option to try to ... true); return 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 - exclude some fields from @Valid validation

I use Spring's @Valid annotation for validate bean's fields which annotated with javax.constraints annotations. But I ... to beat this? 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 do I release file system locks after cloning repo via JGit

I am playing around with cloning a remote existing repo with jGit following the guide here: https://github.com/centic9 ... to clone a new repo. 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 - Generate JNI header files for class files in JDK 10

An integral part of the Java Native Interface (JNI), is the bridging of JVM code and native code through C headers ... to the way javah used to? 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 - DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704

I created local database in DB2 called "TestDB" then I created table called "TestTable". I found that the ... support chained exceptions } } 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 Check box Group

I'm trying to apply some kind of validation on a group of check boxes (e.g. Two contradictory items cannot ... Hopefully share it with us 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 - Insufficient geolocation permissions

I'm working on an Android Project. Basically, I'm trying to run WebView that displays Google Maps. I wanted ... > </application> </manifest> 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 - "Package should contain a content type part [M1.13]"

I am attempting to write to an Excel file however I keep getting the error: Exception in thread "main" org.apache. ... = wb.getSheetAt(0); } } 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 - RxJava/Android: Combine result of two dependent Observables

I have two Observables. Observable<A> getAObservable() Returns Observable of A Observable<B> getBObservable(A) Returns Observable ... b) { } } } 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 - javax.ws.rs.core.Cookie vs javax.ws.rs.core.NewCookie , What is the difference?

I found two classes in JAX-RS API javax.ws.rs.core.Cookie and javax.ws.rs.core.NewCookie. What are the ... and when? 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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272 views

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java - Android Thermal printer Arabic Issue

public class Globals { // TODO IMPORTANT CONFIG CHANGES // ** IMPORTANT CONFIGURATION private static String serverRealUrl = "http ... !·144·"); data = data.replace("$letraguw$", "·...

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

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java - how can I scroll my JFrame using the JScrollbar?

I have a problem. I have a JFrame with some JTextFields, JLabels, Jlists & JButtons now the contents of my ... my JFrame using the JScrollbar? 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 - Redirect System.out.println to log

In my project test suite there is big usage of System.out.println I'm trying to redirect these output to log file ... do it ? 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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386 views

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java - Algorithm Complexity (Big-O) of sudoku solver

I'm look for the "how do you find it" because I have no idea how to approach finding the algorithm ... sure :( Any help is 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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java - What is the purpose for the resource folder in Maven?

Using Eclipse that was being used prior on the project by another developer. Most things are flagged as red and ... Any easy fix to 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 - What does offending class tell me on server startup?

I'm having the jee7 web api as dependency. I can start my app on tomcat application successfully, but what does ... 7.0</version> </dependency> 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 - Intent to choose between the camera or the gallery in Android

I'm trying to launch an intent to pick a image from the camera or the android's gallery. I checked THIS ... "expand" the Android System option? 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 Integrate Open API 3 with Spring project (not Spring Boot) using springdoc-openapi

My Existing Project is on Spring Framework not Spring Boot. I want to integrate Open API 3 with it. I ... springdoc-openapi not using Jersey. 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 - Is there a useful difference between (p ^ q) and (p != q) for booleans?

Java has two ways of checking whether two booleans differ. You can compare them with !=, or with ^ (xor). ... just curious how this all works. 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 prevent query injection on Google Big Query

I'm writing some Google Big-query dynamic reporting utilities to our website, that will allow users to select ... as on traditional RDBMS apis. See Question&Answers more detail:os...

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

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309 views

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java - Collectors.groupby for Map<String,List<String>

Forgive me if the solution is very obvious but I can't seem to figure out how to do this public static void main(String[ ... =[a1, a1], a2=[a2]} See Question&Answers more detail:os...

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

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