Recent questions tagged Java

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java - How to sort an arraylist of objects using one common property

I have an arraylist of Student objects which have several properties including first and last name, gpa, UID ( ... to highest using that number? 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 First Column Value on click in JavaFX TableView like JTable in swing?

I want to get First column value as we can achieve in Jtable using swing. below is my code and image for ... .setItems(data); conn.close(); 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 - JFreeChart format Y-axis to show values in Power

How to format y-axis to show values as 5*10^5, 1*10^6, 2*10^6... instead of 500,000,1,000,000, 2,000,000... and which are divisible by 5 or 10? 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 - Socket gets stuck when doing readLine()

I am trying to connect to the POP server through Sockets in Java. I did the following code to run a LIST ... line by line from the server? 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 - FileNotFoundException even when the file is there

public StormAnalysis(){ try { fScanner = new Scanner(new File("tracks1949to2010_epa.txt")); while(fScanner. ... ideas will 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 - The Anonymous Class Conundrum

I think I understand the basics of Anonymous classes but I'd like to clarify something. when I have a syntax ... If not what happens? 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 - New line ignored in XSSFRichTextString

:EDIT START: Should anyone stumble across this q then here's a small heads up. After getting newLines to work I ... POI v3.9. Any 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 - getting a spring model attribute list element using an index from javascript

Sorry if this has been asked somewhere else, but I have looked all around, found some answers, but not a complete example ... .val(); i++; } } 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 - OpenSSL Encryption of Session Key

I am writing a method that encrypts session keys. It needs to do this such that the key can be decrypted by ... help is 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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java - JTabbedPane - tab with close button reference

I want to build a tabbed interface in JAVA, with close button on each tab. For that I have used the following ... the item array back to false } See Question&Answers more detail:os...

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

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545 views

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java - very large image manipulation and tiling

I need a software or program in Java or a method for tiling very large images (bigger than 140MB). I ... loading the whole image from harddisk. 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 correctly support html5 <video> sources with jetty

i have a simple ResourceHandler on my Java/jetty application, jetty is serving a 2 simple files, one is a html5 ... when is served by jetty? 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 - Executable Jar with depedencies

I'm trying to build an executable jar from the command line (I don't want to use ant or OneJar ) ... dependencies ? Thanks for your help Pierre See Question&Answers more detail:os...

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

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411 views

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java - What is best ways to validate string date to be valid date according to format?

Started working with WEB UI recently. And encountered a problem of date string parsing/validation. "dd-mm- ... .com/a/43076001/1479668 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 - Nutch 2.2.1 doesnt continue after Injector job

I am learning nutch and trying to carawl as per this tutorial .I am working on an ubuntu machinewith bash shell ... can be the probable errors? 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 close JOptionPane automatically?

I have a Thread running and in the time while the thread working i want to display a JOptionPane.showMessageDialog saying ... " exiting."); }} 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 move two circles together in a JFrame from two different classes

I am trying to display the two circles moving together on a single frame through two different classes. But only ... started for 2nd class } } 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 the proper way to swap out an existing JPanel in a JFrame with another?

I'm building a program that requires swapping out the current, visible JPanel with another. Unfortunately there ... 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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757 views

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java - JAXWS Soap Handler Large MTOM Attachments

The JAXWS implementation within IBM WebSphere 7 and 8 appears to have some problems when it comes to ... with large messages: OutOfMemoryError 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 add background image to PDF using PDFBox?

I am using Java PDFBox version 2.0. I want to know how to add a back ground image to the pdf. I can ... good example in the pdfbox.apache.org See Question&Answers more detail:os...

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

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453 views

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java xml annotation get field with namespace, <aaa:bbb>value</aaa:bbb>

I'm working on a project that has no schema and I have to parsing the xml response manually. My ... will automatically generate the list See Question&Answers more detail:os...

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

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444 views

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java - StackedBarChart row key is not added to DefaultCategoryDataSet

I have two entity Classes: A and B. A has B entities, and I have a Map defined in the following format: Map<A, ... B1-B2-B3-B4 A5-B1-B2-B3-B4 See Question&Answers more detail:os...

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

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790 views

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java - Android- EXTRA_HEADERS is not reflecting in updated Chrome version greater than 83

Earlier the EXTRA_HEADERS passed to the customTabsIntent.intent.putExtra(Browser.EXTRA_HEADERS, headers), was working fine. After ... (url)); } 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 - JFreeChart import error

Anyone can tell me where can I find the full version of JFreeChart? I downloaded the JCommon and JFreeChart as ... work either... Many 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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558 views

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java - Need to draw projectile motion of a thrown ball

So I'm writing a code that allows a user to throw an imaginary object at an initial angle and speed to see if they can ... Math.PI / 180)) / g; See Question&Answers more detail:os...

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

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472 views

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java - Else without if

I'm trying to write a code for my computer programming class for a project due Monday, and I'm pretty new to ... I'd be very grateful! 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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649 views

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java - How to add multiple headers and footers in pdf using itext

In my pdf I need to have more than one header and footer.In header I want title heading on left and ... with some example code snippets.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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751 views

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java - Unable to resolve Eclipse "Archive for required library..." issue

I need help with resolving this very common Eclipse error. Background: I am working on an android project with ... need help with this one. See Question&Answers more detail:os...

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

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