Recent questions tagged JAVA

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java - how can you make a progress bar without using JProgressBar?

i am looking at putting a progress bar into a game i am making with a count down from a random number ... across the bottom of the screen. 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 - Jackson custom date serializer

I need to set format for class' date serialization. I have the version of Jackson, which doesn't have @JsonFormat. ... { String value(); } 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 : Copy RawFile to Sdcard (video mp4)

What is wrong on this code ? I've a Raw file in my project (mp4 videofile), when i do this, and ... generated catch block e.printStackTrace(); } 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 - Apache Tomcat Request Threads

We have an application which leaks a bit of memory, a bit being an understatement. I am using jvisualvm to ... busy serving the clients request? 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 - Return ROWID Parameter from insert statement using JDBC connection to oracle

I can't seem to get the right magic combination to make this work: OracleDataSource ods = new oracle.jdbc.pool. ... what is missing from above? 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 - sharing session in web applications

I am developing A Web Application using JSP & Servlets (Container: Tomcat7, Database: Oracle10) I have developed ... will also be 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 - save method of CRUDRepository is very slow?

i want to store some data in my neo4j database. i use spring-data-neo4j for that. my code is like the follow: ... get(i)); } return newRisks; } 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 - Take monochrome picture (black and white) with Android

I would like to take a picture in true black and white in my app. I searched for solutions (in this site ... having an idea please? 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 - How to Use memcached on different port

i have excuted c:memcached>memcached -l 0.0.0.0:11211,0.0.0.0:11212 getaddrinfo(): No such host is known. ... to port 11211 not on 11212.why? 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 a chart in a powerpoint using APACHE POI

How do we create a chart in a ppt in java using apache poi. Which POI API do we use. Below is code I ... Any solution to this? 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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346 views

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java - "SecurityException: sealing violation" when starting Derby connection

I need do start the derby server from my java application using "org.apache.derby.drda.NetworkServerControl" class. ... reason for this 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 - Catch-all servlet filter that should capture ALL HTML input content for manipulation, works only intermittently

I need a servlet filter that will capture all input, then mangle that input, inserting a special token in every ... it looks like it 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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433 views

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java - Merge huge files without loading whole file into memory?

I want to merge huge files containing strings into one file and tried to use nio2. I do not want to load ... loading the whole file into 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 - Validation in Spring MVC

how to get the request object in the validator class, as i need to validate the contents ie the parameters present in the request object. See Question&Answers more detail:os...

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

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257 views

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java - OAuth2 with Spring Boot REST application - cannot access resource with token

I want to use OAuth2 for my REST spring boot project. Using some examples I have created configuration for OAuth2: ... Thank you for any help! See Question&Answers more detail:os...

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

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470 views

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java - Transaction management for multiple database Using Spring & Hibernate

Am coming up with a Spring & Hibernate application which has Inserts/Update to its own system database and ... with different databases. -Bharat 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 - Date change when converting from XMLGregorianCalendar to Calendar

When testing out a web service that maps datetime types between systems, I noticed that sending any date before the ... println(ex); } } } See Question&Answers more detail:os...

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

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327 views

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java - How can I read specific rows with Apache POI?

I'm using the Apache POI library, but I have some data that I don't want to be read - So I need the ... looking forward to hear from 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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249 views

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java - threadlocal variables in a servlet

Are the threadlocals variables global to all the requests made to the servlet that owns the variables? I am ... the request ends the execution See Question&Answers more detail:os...

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

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287 views

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java - Modifying if-else to strategy pattern

I have the following if-else branch in java. if (str.equals("a")) { A;} else if (str.equals("b") ... to modify this code into strategy pattern ? See Question&Answers more detail:os...

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

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567 views

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java - Stop an infinite loop in an ExecutorService task

import java.util.Arrays; import java.util.Iterator; import java.util.List; import java.util.concurrent.Callable ... executing the infinite loop? 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 batch-Delete the flatfile from directory after processed

In spring batch , I am using MultiResourceItemReader to read multiple files from the directory. Then I am using a ... > </property> </bean> See Question&Answers more detail:os...

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

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302 views

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java - Layered SurfaceViews in a FrameLayout in Android

I am attempting to build an augmented reality application for Android and have come across the problem of ... superimposed on CustomCameraView? See Question&Answers more detail:os...

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

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231 views

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java - Reduce number of read in Firestore Android

I want to reduce number of reads in order to get Question's detail from QuestionCollection (Array of Questions) ... and most Viewed question. 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 communication between fragment and baseadapter

Need expert opinion how should i structure this issue. I have a custom method process_filter that resides in a fragment as it ... 2"); } } } } See Question&Answers more detail:os...

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

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210 views

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java - Workaround for Apache Ant Install Bug

Can someone please help with instructions for a workaround on the Apache Ant installation bug in Windows? ... -Djava.net.preferIPv4Stack=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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194 views

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java - How can I get the position of bits

I have a decimal number which I need to convert to binary and then find the position of one's in that binary ... 32 - result) : result; } See Question&Answers more detail:os...

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

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319 views

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java - Unable to view Visual GC in VisualVM

I am using Java VisualVM on my local windows machine to monitor my remote server(Linux). I am able to get all stats ... .java:613) ... 8 more See Question&Answers more detail:os...

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

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