Recent questions tagged JAVA

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java - JAXBContext.newInstance memory leak

After a recent deployment in system test, one of our servlets was getting hit much harder than usual and we ... t get garbage collected? 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 - Static Method Memory Allocation

We have two classifications heap and stack . When a object is created, memory for object is stored in heap. ... where will it allocate 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 - How to serialize ANY Object into a URI?

My basic question: is there anything built that already does this automatically (doesn't have to be part of a ... ("whateverElse", C2Object);. 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 0 returned by InputStream.read() means? How to handle this?

What 0 (number of bytes read) returned by InputStream.read means? How to handle this situation? Update: I mean ... return number of bytes read. 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 - Add commas (grouping separator) to number without modifying decimals?

I'm trying to format a string to add commas between 3 digit groups EG: 1200.20 >> 1,200.20 15000 > ... modifying the decimals in 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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java - convert ArrayList.toString() back to ArrayList in one call

I have a toString() representation of an ArrayList. Copying the toString() value to clipboard, I want to ... Lists.newArrayList() Suggestions? 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 - separate integration tests from unit tests

Is it possible to isolate integration tests from unit tests within same module? I created simple pom: <?xml ... but without profile 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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java - Can't downgrade database from version 2 to 1 even after fresh install and re-run

I'm writing an android app using SQLite DB. I had few experiments and changed the DB version from 1 to 2. ... change the version to 1 again? 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 - AlarmManager: how to schedule a daily alarm and deal with time changes

I need to set up an alarm daily at a given hour. I'm programming the alarm using AlarmManager.RTC_WAKEUP, ... time changes? 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 remove gaps between tiled textures?

I'm using LibGDX to make a platformer. I'm using square tiles for the platforms but when they are drawn some of ... or know how it fix 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 - How to perform a complicated change of variables for a polynomial (in Mathematica)

I have an integer polynomial in four variables (w, x, y, and z) that I know can be written as an ... to easily do this change of variables? 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 Data Querying DateTime with only Date

I have this Data Model public class CustomerModel{ @Column @Type(type="org.joda.time.contrib.hibernate.PersistentDateTime") ... on a given date? 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 - PUT files to Google Cloud Storage (GCS) via Signed URLs

I am trying to use "signed URLs" to access/upload files to Google Cloud Storage (GCS). Followed the ... help would be greatly 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 - Spring boot test @Transactional not saving

I'am trying to do a simple Integration test using Spring Boot Test in order to test the e2e use case. My test ... entity .... 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 - Tomcat: getHeader("Host") vs. getServerName()

I've got a Tomcat app that is being served up from multiple domains. Previous developers built a method to return ... (); } 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 - setRecycledViewPool method in RecyclerView

I am trying to understand what the setRecycledViewPool method actually does along with the RecyclerView in the following ... when to use 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 - How to create BLOB object?

How to create BLOB object in Java? How to set the BLOB value from DB? How to set the BLOB value in DB? I ... fileId); But it gives me an error. 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 define a generic list deserializer through annotations with Jackson?

Let's say I have an object which has list properties: public class Citizen { name List<Tickets> tickets List< ... not just for empty strings. 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 - Eclipse JFace's Wizards

I need a wizard which second page content depends on the first page's selection. The first page asks the ... any cleaner solution I 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 - What does preverification of J2ME application mean?

I read the following: J2ME applications, unlike normal Java applications are preverified. What exactly does the ... it something like checksum? 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 - @Async not working for me

I am using @Scheduled and it have been working fine, but can't get the @Async working. I tested ... .SimpleControllerHandlerAdapter" /> 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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312 views

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java - Browser download complete event

We've been looking for a while for an answer to this, but haven't found a solution. We have a web server ... report back to the server via ajax? 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 use JGit to get list of changes in files?

Using JGit, I want to get a list of changes in files of a commits as is possible with git log --full- ... = new WSAHeaderHelper(); ChangeType: A 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 - Jetty webserver security

I have a website powered by Jetty. I'd like to make the site password protected (or similar). Is there a ... ). All help much appreciated. Dan 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 JVM's implicit memory barriers behave when chaining constructors?

Referring to my earlier question on incompletely constructed objects, I have a second question. As Jon Skeet pointed ... javacs are doing 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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750 views

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java - Android Webview cannot render the pdf sometimes and shows blank/white page instead

Open the pdf in the webview using google docs Open the same pdf or different pdf again and again. Sometimes it ... (new WebChromeClient ()); } 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 - Autowiring of beans generated by EasyMock factory-method?

I have a problem that seems really strange to me. I have the following setup: An interface: package com. ... objects has been solved. /Mattias 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 - Selenium Find Element Based on String in Text or Attribute

I'm trying to have Selenium find an element based on a string that can be contained in the element's text or ... part of the OR condition does. See Question&Answers more detail:os...

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

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