Recent questions tagged Java

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java - Regex search pattern in very large file

I'd like to search pattern in very large file (f.e above 1 GB) that consists of single line. It is ... I hope my explanation is pretty clear. 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 - JavaFX TableView how to get cell's data?

I'm using that method to get whole object. tableView.getSelectionModel().getSelectedItem() How can I get data ... get S20BJ9DZ300266 as 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 manage a large dataset using Spring MySQL and RowCallbackHandler

I'm trying to go over each row of a table in MySQL using Spring and a JdbcTemplate. If I'm not mistaken ... read the whole thing. Any ideas? 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 - Action TIME_SET in android getting called many times without changing the time manually

I have a receiver which listens to the TIME_SET action android. but some times am getting intent action without ... /intent-filter> </receiver> 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 - Instantiate beans in order in Spring?

Is it possible to set order of instantiation in Spring? I don't want to use @DependsOn and I don't want to ... the task. Order means order :) 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 - jdbc4 CommunicationsException

I have a machine running a java app talking to a mysql instance running on the same instance. the app uses ... using c3p0 solve the 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 - STOMP Spring WebSocket message exceeds size limit

I am implementing Spring WebSocket into our Spring MVC web application. However I am running into message over size ... out and get it 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 - Motivation for Simple Factory and Factory Method Pattern

I know there are a lot of questions out there about differences of different factory patterns, but the answers are ... thing clear on this site) 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 MVC: Error 400 The request sent by the client was syntactically incorrect

This seems to be a common issue. I have gone all the answers given in SO but could not make it work. I ... log4j.properties but it didn't work. 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 a static Calendar thread safe

I'd like to use a Calendar for some static methods and use a static field: private static Calendar calendar = ... safe (it should be static)? 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 - Dynamically add a servlet to the servletConfig

I have a Java web application that uses a plugin architecture. I would like to know if anyone has a ... class from the the servletconfig. 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 detect whether String.substring copies the character data

I know that for Oracle Java 1.7 update 6 and newer, when using String.substring, the internal character array ... and check the memory usage. 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 - Tomcat include another xml file to web.xml

Hello everyone, Since I have lots of servlet mappings in my web.xml I was wondering if I could actually ... english) Thanks in advance, Alex 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 - React excel file download corrupt

Im trying to download an Excel file in Reactjs by calling a Spring REST endpoint but I'm running into issues ... is ok Any ideas welcome Cheers 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 - Class loader error - unnamed module of loader org.springframework.boot.devtools.restart.classloader.RestartClassLoader

I am quite new to Spring and Java as a whole and I am currently working on an API. I've got this code which ... . Any ideas? Thank you 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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820 views

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java - Is a Spring Data (JPA) Repository thread-safe? (aka is SimpleJpaRepository thread safe)

I am using a Spring Data (JPA) repository to take care of CRUD boilerplate. I define my repository ... : is SimpleJpaRepository thread safe? 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 map enum in JNA

I have the following enum how do i map in jna ?? This enum is further referenced in structure. ... } eFtUsbDeviceStatus; Abdul Khaliq 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 way in Spring to autowire all dependencies of a given type?

I'm using annotations-based wiring (ie @Configurable(autowire=Autowire.BY_TYPE)) for a given class, and I'd like ... list> in XML or something? 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 best way to listen for changes in JTable cell values and update database accordingly?

I'm building and app with multiple JTables and I need to detect when cell value change occurs so I can update it ... Any other way to do 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 - How to get the list of all apps on android device using terminal

there is a command line to get package name:- adb shell pm list packages But how to get the list of all applications on the device 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 - Can Nashorn startup slowness be overcome?

I've used Rhino for a scripting component inside graphics. In the project there are about 200 small scripts running ... fast as Rhino on Java7. 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 - Maven Plugin API: Get MavenProject from Artifact

I am trying to extract information on all dependencies (recursively) used in my project. It seems like the ... via the Artifacts getters? 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 - Clearing preferences in SharedPreferences in Android, not just Values

from what I can incur out of the SharedPreferences documentation, I can update a preference, add one or clear all ... they refer to as well. See Question&Answers more detail:os...

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

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561 views

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java - Regex to match exactly n occurrences of letters and m occurrences of digits

I have to match an 8 character string, which can contain exactly 2 letters (1 uppercase and 1 lowercase), and ... if there's a better 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 - How do you get selenium to recognize that a page loaded?

In certain unknown situations selenium does not detect that a page has loaded when using the open method. I ... loaded when this error occurs? 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 - Spinner with empty default selected item

I'm trying to create a spinner with default empty selected item, but it displays the first item from the ... Toast.LENGTH_SHORT).show(); } 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 - Why does one loop throw a ConcurrentModificationException, while the other doesn't?

I've run into this while writing a Traveling Salesman program. For an inner loop, I tried a for(Point x: ... exception while the other does not? 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 - Synchronization while using AtomicInteger

Let's assume that I want to implement a very simple Bank Account class , and we want to take care about ... amount); return 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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