Recent questions tagged Java

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java - Apache POI merge cells from a table in a Word document

I need to have a table with the cells on the first and second row merged. Something like this: Image of table ... , am I doing something 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 - Bitmap to Mat gives wrong colors back

So I make a bitmap from a blob with the next code: byte[] blob = contact.getMP(); ByteArrayInputStream inputStream = ... a Mat. What is 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 - Stack overflow error handling in finally block

I have a program in java, which runs infinite times. Program code: void asd() { try { //inside try ... occur if we get OutOfMemoryErrors too? 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 - Animated GIF on a JButton, play it when mouse is hovered

Icon icon = new ImageIcon(getClass().getResource( "/img/icon.gif" ) ); aButton = new JButton("Its a ... void mouseDragged(MouseEvent e) { } 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 - @AspectJ pointcut for subclasses of a class with an annotation

I'm looking for a pointcut that matches method executions in classes that subclass a class with a specific annotation. ... How can I match both? 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 - Array variable "might not have been initialized"

I get the error: TestCounter.java:115: variable counters might not have been initialized counters[i] = new Counter(i ... ].whatIsCounter()); } } 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: Retrieving configuration from a database

Can anyone offer me some guidance on the best way for me to achieve this goal. I'd like to extend the ... have these new values picked up. 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 - Upload progress listener not fired (Google drive API)

I want to show progress by percent of an uploading file using Google drive API. My menthod has successful upload a ... }; task.execute(); } 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 - Get all possible combinations of characters in an array

I have an array of characters c[][] with different mappings to each index. For example: {'a', 'b', 'c', ' ... asking you all to help me with! :) 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 - Exchange.getIn().getBody() returns empty string in camel on second call

I have 2 identical calls: String msg1 = exchange.getIn().getBody(String.class); String msg2 = exchange. ... to do with HttpMessage conversion. 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 - Guidelines for testing multithreaded code or ensuring that code is thread-safe

Are there any guidelines for testing multi-threaded code (other than throwing a bunch of threads at the ... for a multithreaded scenario? 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 - UnsatisfiedLinkError on Lib rocks DB dll when developing with Kafka Streams

I'm writing a Kafka Streams application on my development Windows machine. If I try to use the leftJoin ... you ever experienced 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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java - Possible resource leak when reusing PreparedStatement?

Suppose you have the following code: Connection connection = null; PreparedStatement ps = null; try { Connection = ... -wise) in this example? 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 - Many to many association without join table

I'd like to apply JPA in the following (simplified) database: NODE AUTHORITY ----- ---------- ... way arroud beside modifying the database? 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 Load orm.xml

I want to externalize my custom mappings for Jpa to an XML file. I've seen examples of using orm.xml ... -set-mapping> </entity-mappings> 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 heap memory usage graph look like this?

I have install glowroot (java application monitoring) to my JVM. When my application idles, I get this kind graph ... like that? I am curious. 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 - Null pointer exception when checking for permission with android.content.Context.checkPermission

I need to check for permissions before querying the Android calendar for events. To do it, Android studio is ... anybody help me with 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 - Android ClassNotFoundException: Didn't find class on path

Here's the exception message that I get when I launch the app. FATAL EXCEPTION: main Process: net. ... crashedProcess: net.johnhany.opencv3jni 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 - JPA many-to-many persist to join table

I have two table with many-to-many relations. I mapped this two entities when I am persisting users doesn't insert ... (); return users; } } 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 - Getting ExecuteBatch to execute faster

I'm trying to read a table from a sybase server, process the rows, and output the results to another table. (Below is ... "done "+(new 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 - JTextPane text background color does not work

I am trying to make a small HTML-wysiwyg with a JTextPane but I can't get the BackgroundAction to work. ... border are around each JTextPane): 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 - Cucumber-JVM 3 - io.cucumber.datatable.UndefinedDataTableTypeException

I updated from Cucumber-JVM 2.4.0 to 3.0.2 in my pom.xml and DataTables started throwing this exception: io. ... Cucumber-JVM v3.x.x? UPDATE: See Question&Answers more detail:os...

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

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659 views

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java - Set optional parameters in JPQL Query

I got this list of coins that i want to filter with that 3 optional parameters(Currency, quantity and year) ... (); return filtradoMonedas; } 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 Plugin Get Code from Current Open File

How can I get the code from the current open file in Eclipse returned in a String or String[]? I need this for a plugin ... , world!");" "}" "}" 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 - Modify an array passed as a method-parameter

Suppose I have an int-array and I want to modify it. I know that I cannot assign a new array to array ... mean to make last example printing 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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java - Android webview cookie returns null

I'm trying to simply set and retrieve a cookie inside a webview in android. I have tried numerous cookie manager ... return; } finish(); } 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 - Mahout : To read a custom input file

I was playing with Mahout and found that the FileDataModel accepts data in the format userId,itemId,pref(long,long ... this dataset on Mahout? 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 64-Bit Server VM warning: ignoring option MaxPermSize=350m;

When I'mtrying to open Intellij IDE using command line in linux like this ./phpstorm.sh both android studio and ... be appreciated, 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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