Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Login
Remember
Register
Ask
Q&A
All Activity
Hot!
Unanswered
Tags
Users
Ask a Question
Ask a Question
Categories
All categories
Topic[话题] (13)
Life[生活] (4)
Technique[技术] (2.1m)
Idea[创意] (3)
Jobs[工作] (2)
Others[杂七杂八] (18)
Code Example[编程示例] (0)
Recent questions tagged Java
0
votes
430
views
1
answer
java - What does "optional operation" mean in Javadoc of for example Set#add(E)?
When in the java documentation for Set it says in the specification of a method Optional Operation e.g. ( ... by that implementation of Java? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
737
views
1
answer
java - What's the point of beans?
I've bean doing some JSP tutorials and I don't understand what the point of a bean class is. All it is, is get and ... ) %><BR> </BODY> </HTML> See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
1.0k
views
1
answer
java - Hibernate HQL issue expecting IDENT found "*"
I need to go whole datas from relative table so I'm using somethink like this (i would use it in sql) ... datas from column R with hibernate? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
518
views
1
answer
java - What alternatives are there to Hibernate Validator's @SafeHtml to validate Strings?
As stated in the JavaDocs, it will be removed in a future release. Is there any alternative library which works similarly via annotations? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
807
views
1
answer
java - JavaFX - getScene() returns null
I just started using JavaFX Scene Builder to build a small application. It is made up of a controller class 'Login. ... > What am I doing wrong? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
323
views
1
answer
java - AppCompatActivity not implementing LifecycleOwner
I am using Android Support Library 26.1.0. These are the dependencies in app module - implementation "android. ... new MutableLiveData<>(); } See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
392
views
1
answer
java - Iterating HashMap on order it has been set
I've set a HashMap on certain order but it is iterated on a strange order! Please consider code below: ... Any help will be appreciated. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
528
views
1
answer
java - How to change jsessionid cookie path to server root in Spring app on Jetty?
I have a Jetty server running a Spring app on the /app context. The app uses sessions, so it sets a session ... </configuration> ... </plugin> See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
408
views
1
answer
java - How to programmatically setup a <security-constraint> in Servlets 3.x?
In my current web application I am trying to get rid of web.xml and I have not been able to properly ... does not reference any specific servlet See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
484
views
1
answer
java - Open EXISTING xls in Apache POI
I have an existing file (C:wb.xls) that I want to open and make changes to. How in Apachie POI do ... file or how to autoformat column widths? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
388
views
1
answer
java - How to break a while loop from an if condition inside the while loop?
I want to break a while loop of the format below which has an if statement. If that if statement is true, ... if condition and while loop } } See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
428
views
1
answer
java - The return of String.intern() explained
Consider: String s1 = new StringBuilder("Cattie").append(" & Doggie").toString(); System.out.println(s1. ... get all the interned strings. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
428
views
1
answer
java - Maven fails to parse POMs at jenkins
I have this simple maven project, containing a few common test tools. It builds locally, but on jenkins I am ... ... 16 more Finished: FAILURE See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
388
views
1
answer
java - Access Outer Class this instance
how do we access outer class this instance: eg in Class A { Class B { this.helloB(); (A's this).hello() ... we access A's this instance in Java See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
622
views
1
answer
java - How do I work with JavaFX in Eclipse Juno?
I have installed jdk1.7.0_15. JavaFX's download page says the following: JavaFX 2.2.7 contains the latest ... help me get started with JavaFX See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
458
views
1
answer
java - JPA with JTA: Persist entity and merge cascaded child entities
I have a bidirectional one-to-many relationship with the following entity classes: 0 or 1 client <-> 0 or ... (no vendor-specific solution). See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
495
views
1
answer
java - Insert row into database with PreparedStatement
I want to insert a row into a table using PreparedStatement. The table got 3 columns(int, String, String). The ... ! It's an MySQL database. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
421
views
1
answer
java - split("\") and error
String str = "u0054u0068u0069u006eu006bu0050u0061u0064"; String[] strArray = str.split(""); but this error occured. ... error near index 1 See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
319
views
1
answer
java - When is an unassigned expression a valid statement?
I've read Oracle's expressions tutorial and couldn't understand this. It is well known that the following line of ... as a Java line of code? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
450
views
1
answer
java - Sorting a LinkedHashSet
I'm wondering if it's possible to sort a LinkedHashSet. I've tried the statement Collections.sort((List< ... I use another Data Structure? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
502
views
1
answer
java - Can't define a private static final variable because it throws an exception
I have a class like: public class SomeClassImpl implements SomeClass { private static final SomeLib someLib = new ... find anything on it. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
730
views
1
answer
java - FileNotFoundException (permission denied) when trying to write file to sdcard in Android
As you can notice from title, I have a problem with writing file to sdcard in Android. I've checked this ... public space in sdcard anymore or? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
357
views
1
answer
java - 'Failed to find style mapViewStyle' error persists
I've been working on this app for almost a year now (senior project) when it just decided to break a ... highly appreciate any help in advance. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
337
views
1
answer
java - How to determine the order of listeners in web.xml
I got a bunch of servlet context listeners in my Java webapp, each of them gathering some information about the ... I can solve my problem? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
582
views
1
answer
java - Logback configuration via jvm argument
How can we load logback.xml via jvm argument if this is not present in project classpath? I'm using -Dlogback. ... xml but this is not working. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
576
views
1
answer
java - Why does 0.06 + 0.01 = 0.07 in ColdFusion?
Why don't math operations in ColdFusion seem to be affected by floating point math issues? Take the code: ... at an isolated anomaly here? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
548
views
1
answer
java - How to retrieve JSON Response from a javax.ws.rs.core.Response response?
I am making a request to an API and getting a response status code of 200. Response of the api includes ... from the web client response? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
0
votes
420
views
1
answer
java - Can 0.99999999999 be rounded to 1.0 when multiplying?
When multiplying a floating point number that is very close to 1 with an int > 0, can it ever be ... prompted me to ask this question. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
java
Page:
« prev
1
...
68
69
70
71
72
73
74
75
76
77
78
...
715
next »
Ask a question:
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question
Just Browsing Browsing
[1] ant-design-vue pro 导航菜单怎么加iconfont 图标
[2] Integrate Google Analytics into VAST Preroll XML
[3] 服务器搭建mysql环境会卡吗?
[4] Angular 10.x一个组件中需要多个Observable结果,怎样才算是合理
[5] Intellij Android Studio opens localhost page to login on github
[6] 关于MySQL8 Porfile的问题
[7] vue中高亮p标签中的某一个字符串
[8] 移动端前端如何获取用户网络状态特别是5G状态
[9] scala - Kafka producer: send avro as array[byte] without schema
[10] taro(ts)编写小程序内置组件类型异常的问题
2.1m
questions
2.1m
answers
60
comments
57.0k
users
Most popular tags
javascript
python
c#
java
How
android
c++
php
ios
html
sql
r
c
node.js
.net
iphone
asp.net
css
reactjs
jquery
ruby
What
Android
objective
mysql
linux
Is
git
Python
windows
Why
regex
angular
swift
amazon
excel
algorithm
macos
Java
visual
how
bash
Can
multithreading
PHP
Using
scala
angularjs
typescript
apache
spring
performance
postgresql
database
flutter
json
rust
arrays
C#
dart
vba
django
wpf
xml
vue.js
In
go
Get
google
jQuery
xcode
jsf
http
Google
mongodb
string
shell
oop
powershell
SQL
C++
security
assembly
docker
Javascript
Android:
Does
haskell
Convert
azure
debugging
delphi
vb.net
Spring
datetime
pandas
oracle
math
Django
联盟问答网站-Union QA website
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
DevDocs API Documentations
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
在这了问答社区
DevDocs API Documentations
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
DevDocs API Documentations
广告位招租
...