Recent questions tagged Java

0 votes

535 views

1 answer

java - Fastest way to read huge number of int from binary file

I use Java 1.5 on an embedded Linux device and want to read a binary file with 2MB of int values. (now ... change. (Smaller file for init) See Question&Answers more detail:os...

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

0 votes

492 views

1 answer

java - JSF: Accessing Bean from Validator via field

I have a JSF validator that checks whether a Container Number string conforms to the ISO-6346 specficiation. It ... . Much appreciated. D. See Question&Answers more detail:os...

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

0 votes

461 views

1 answer

java - Android Library AAR depending on another library

Hi I have a Android Library Project which produces an AAR. All is good but when I use the AAR in another ... AAR as well when generating one? See Question&Answers more detail:os...

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

0 votes

338 views

1 answer

java - How are Integer arrays stored internally, in the JVM?

An array of ints in java is stored as a block of 32-bit values in memory. How is an array of ... every last ounce of performance matters? See Question&Answers more detail:os...

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

0 votes

403 views

1 answer

java - Getting error when using prepareStatement with interval in query

When running this query SELECT SYSDATE + INTERVAL '7' DAY FROM DUAL; in a prepareStatement like this ... statements together with interval? See Question&Answers more detail:os...

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

0 votes

555 views

1 answer

java - Hibernate : org.hibernate.loader.MultipleBagFetchException: cannot simultaneously fetch multiple bags

Entity classes Customer @Entity @Table(name="Custumer") public class Custumer implements Serializable { @Id @GeneratedValue ... relations in DB See Question&Answers more detail:os...

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

0 votes

510 views

1 answer

java - Generic Array Creation Compilation Error From Inner Class

I'm trying to implement a linked collection using generics, something like the following. public class A<E> { ... and leaves A with E#1. See Question&Answers more detail:os...

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

0 votes

555 views

1 answer

java - How to stop editing with DefaultCellEditor when a separate JBtton is pressed

I got a table with a custom TableCellEditor (extending DefaultCellEditor) with a JFormattedTextField as the editor component ... good ideas =) See Question&Answers more detail:os...

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

0 votes

406 views

1 answer

java - Why does worker node not see updates to accumulator on another worker nodes?

I'm using a LongAccumulator as a shared counter in map operations. But it seems that I'm not using it correctly ... I must start the task with? See Question&Answers more detail:os...

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

0 votes

527 views

1 answer

java - Eclipse pausing without a breakpoint

While debugging my project in Eclipse, it will (repeatably, at the same point in the code) pause execution ... could be causing this behaviour? See Question&Answers more detail:os...

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

0 votes

494 views

1 answer

java - Android TextToSpeech.synthesizeToFile() file is not created

I am trying to implement a pause and play function to some text using tts and MediaPlayer. However, I can't seem to be ... ); } } }); Any ideas? See Question&Answers more detail:os...

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

0 votes

448 views

1 answer

java - Adding Schema name to entity in Spring data?

I am getting an error when using an Oracle DB and Spring Data. The error is: ORA-00942: table or view does ... ; //getters and setters etc... See Question&Answers more detail:os...

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

0 votes

378 views

1 answer

java program using int and double

I have written a simple Java program as shown here: public class Test { public static void main(String[] ... help me in understanding this. See Question&Answers more detail:os...

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

0 votes

408 views

1 answer

java - Casting node to element giving ClassCastException

here n2 is my NodeList, and i just want to see the first child node of my root element public void ClickMe( ... be cast to org.w3c.dom.Element See Question&Answers more detail:os...

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

0 votes

483 views

1 answer

java - Hibernate event listeners for JPA callbacks

How can I enable the Hibernate event listeners, that handle JPA callbacks? Currently I am using using ... ?) Object persist successfully See Question&Answers more detail:os...

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

0 votes

469 views

1 answer

java - Running akka with runnable jar

I'm trying to implement akka in java maven project with NetBeans. It runs fine when i run it from NetBeans but when I ... 1" port=10300 } } } } See Question&Answers more detail:os...

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

0 votes

443 views

1 answer

java - Better way to find matches in two sorted lists than using for loops?

I have two sorted lists, both in non-decreasing order. For example, I have one sorted linked list with elements [2,3 ... time less than O(n^2)? See Question&Answers more detail:os...

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

0 votes

390 views

1 answer

java conditional operator and different types

I have two methods in the Item Class: public void setValue(String v); public void setValue(Double v); and ... of conditional Operator. but why? See Question&Answers more detail:os...

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

0 votes

561 views

1 answer

java - How to put component in bottom-right corner with GridBagLayout?

I need to display a single component within a JPanel, and I want to keep that component in bottom right corner ... What am I doing wrong here? See Question&Answers more detail:os...

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

0 votes

740 views

1 answer

java - RayCasting in Libgdx 3d

Alright so I've been trying for quite some time too Raycast in libgdx for 3d collision detection based on where ... me in the right direction? See Question&Answers more detail:os...

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

0 votes

455 views

1 answer

java - Choosing the correct JRE version in Gradle with Eclipse

I'm using Gradle with the Eclipse plugin to generate project files for my project, but I can't get it to ... such JRE is installed in Eclipse. See Question&Answers more detail:os...

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

0 votes

431 views

1 answer

java - SimpleDateFormat problems with 2 year date

I'm trying to understand two things: Why doesn't the following code throw an exception (since the SimpleDateFormat is ... 1.6.0_38-b05 on Ubuntu See Question&Answers more detail:os...

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

0 votes

1.2k views

1 answer

java - Aliases expected length is 0; actual length is 1 on hibernate query cache

String q1Str = "SELECT parent_id FROM meta WHERE st_id = "+childIds+";"; Query q1 = em.createNativeQuery(q1Str); / ... is 0; actual length is 1 See Question&Answers more detail:os...

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

0 votes

837 views

1 answer

java - XSSFSheet (Apache POI) sorting and filtering

I'm creating an autofilter on an XSSFSheet as follows: sheet.setAutoFilter(new CellRangeAddress(1, sheet.getLastRowNum() ... that? Thanks! Sam See Question&Answers more detail:os...

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

0 votes

666 views

1 answer

java - synchronized object not locked by thread before notifyAll()

I want to have a boolean to notify some sections of the system that a specific service started. For some ... locked inside a synchronized block? See Question&Answers more detail:os...

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

0 votes

400 views

1 answer

java - How to copy some content in one .docx to another .docx , using POI without losing format?

Suppose I have two .docx files, input.docx and output.docx I need to select some of the content in input.docx and ... fos.flush(); fos.close(); See Question&Answers more detail:os...

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

0 votes

418 views

1 answer

java - How to set up Maven to override a settings file for another when running a test?

See the following Maven generated project target classes test-classes src main java scripts resources datasource-settings.xml ... get my goal ? See Question&Answers more detail:os...

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

0 votes

404 views

1 answer

java - What is TestSuite?

I am relatively new to Java and new to JUnit testing. It's absolutely clear to me what the Test class uis, ... explain me what TestSuite is for? See Question&Answers more detail:os...

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

Categories

Just Browsing Browsing

Most popular tags