Recent questions tagged Java

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java - How can I access the configured Log4J appenders at runtime?

I want to configure an appender at startup and then dynamically add and remove it from various loggers on demand. ... myself and hold onto 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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java - Location of generated source files for maven directory structure

Besides src/main/java folder, we have one folder that contains some generated java sources that are required for the ... this one. Thank you. 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 - Create POJO Class for Kotlin

I want to create POJO class for Kotlin, as we know that www.jsonschema2pojo.org converts JSON to POJO so we ... any simplest way to create 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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java - Google android maps api v2 Show Marker Title Always

I have a google maps v2 in my android application and some markers on it. When user click one of these ... titles always without user click? 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 - Closing URLConnection and InputStream correctly?

I've seen many different examples of using HttpURLConnection + InputStream, and closing them (or not closing them) ... disconnect(); } } 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 - Do uninitialized primitive instance variables use memory?

In Java, does it cost memory to declare a class level instance variable without initializing it? For example: ... sub-classes to save memory? 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 - Find indexOf a byte array within another byte array

Given a byte array, how can I find within it, the position of a (smaller) byte array? This documentation ... an instance rather than the first. 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 - Could not verify the provided CSRF token because your session was not found in spring security

I am using spring security along with java config @Override protected void configure(HttpSecurity http) throws Exception { ... I am doing wrong. 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 - Hibernate dialect for MySQL 8?

Is there a Hibernate dialect for MySQL 8? Or should I use the org.hibernate.dialect.MySQL57Dialect that ships with ... m using hibernate 5.2.16 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 - Mockito: How to match any enum parameter

I have this method declared like this private Long doThings(MyEnum enum, Long otherParam); and this enum public enum ... ))) .thenReturn(123L); 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 getServletContext() in spring mvc Controller

I need to upload images in my project. How to get the upload path in SpringMVC. The path is; / ... undefined for the type Homepage 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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java - Populating a List with a contiguous range of integers

I'd like to have a list which contains the integers in the range 1 to 500. Is there some way to ... values individually within my own code? 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 - HikariCP Postgresql Driver Claims to not accept JDBC URL

I've pushed my application to cloudfoundry. However every time I connect to my postgresql/elephant sql I received ... anything I've missed? 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 - Hiding ‘Bottom Navigation Bar’ whilst keyboard is present - Android

I have a small demo chat UI application. This application has a bottom navigation bar. I need the bottom ... > </RelativeLayout> </RelativeLayout> See Question&Answers more detail:...

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

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java - How to correctly determine that an object is a lambda?

I see that the class of a lambda is isSynthetic() && !isLocalOrAnonymousClass(), but I presume that the same may ... a given object is a lambda. See Question&Answers more detail:os...

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

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141 views

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java - How can I make a static method in Objective-C?

In Java, I may have a class, for example, Utility and I have a static method called changeToCapitalLetter, so I ... in Objective C? 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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java - OptionalInt vs Optional<Integer>

When scrolling through the documentation for the java.util package, I was surpised to find that Optional<T> ... an inconsistent design choice. 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 - openjdk 1.7 in eclipse: operator is not allowed for source level below 1.7

Eclipse gives me an error: '<>' operator is not allowed for source level below 1.7 I guess this is ... . Perhaps this is relevant information. 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 sjavac, who is it for and how do I use it?

There has been some buzz about a tool called sjavac on the OpenJDK mailing lists. Also, there are two ... reference to future sjavac FAQ. 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 wait for Android runOnUiThread to be finished?

I have a worker thread that creates a runnable object and calls runOnUiThread on it, because it deals with Views and ... me if it's blocking. 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 - Intellij IDEA won't start

When I open Intellij 14 , it starts the initial loading and then following is shown in the screen.After that ... how to overcome this 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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593 views

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java - The constructors Integer(int), Double(double), Long(long) and so on are deprecated

While working, I got the warning The constructor Integer(int) is deprecated and I couldn't find an alternative ... these classes as for Integer? 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: Mapping Multiple URLs to Same Controller

I have like 20+ forms which are linked from the same page. Some forms share the same controller, while ... anyone done something like 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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458 views

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java - Maven Scope for Lombok (Compile vs. Provided)

I recently found out that the lombok.jar ends up in our final artifact, which shouldn't be necessary. In my ... .0_25-b17 on MacOSX 10.9 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 type ":" ("colon") in regexp?

: ("colon") has a special meaning in regexp, but I need to use it as is, like [A-Za-z0-9.,-:]*. I have tried ... does not work [A-Za-z0-9.,-:]* 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 - JUnit4 fail() is here, but where is pass()?

There is a fail() method in JUnit4 library. I like it, but experiencing a lack of pass() method which is not ... { } // assertTrue(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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java - Android: How to programatically login to website and retrieve data from it?

Ok, guys, so I'm recently developing android app that saves user's ID and PASSWORD to SharedPreferences. Now, when ... /anything how to do that? See Question&Answers more detail:os...

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

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143 views

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java - https Session and posting problem

I have an application that needs to be able to post to https with an authentication request and then a register ... buf2.toString(); } } See Question&Answers more detail:os...

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

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