Recent questions tagged Java

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java - WEEK_OF_YEAR inconsistent on different machines

Update: ok, I seem to have found half the answer. If I created my Calendar with a no-argument ... be causing this WEEK_OF_YEAR inconsistency? 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 - Adding an annotation to a runtime generated class using Javassist

I'm using Javassist(Java 1.7) to add an annotation to the class ClassA, but i get the exception. What am i ... ClassPool.java:1093) ... 15 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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java - Prefuse example graph partly outside of JPanel

I want to use Prefuse to visualise a graph. I followed their tutorial and tried their sample application. Its sourcecode can be ... ); } }); } } 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 main advantage of making a class abstract

Why do we declare a class as abstract? I know it cannot be instantiated, but why give a special keyword for ... of making a class abstract? 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 - Use two datasources with jdbc template

So, I've worked on a spring boot project and now I am working on the database. I thought that it would be ... this problem? Please let me know! See Question&Answers more detail:os...

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

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436 views

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java - Spring @Transactional is not working

I am trying to use annotated TX Spring support. Application context XML: <?xml ...> <tx:annotation-driven/> < ... FALSE. What am I doing 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 - PHP integer part padding

I need to pad the integer part with 0, the integer part must be at least 2 characters str_pad( 2 ,2,"0 ... for Java: Java integer part padding 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 - JSTL & Spring: Accessing methods with arguments

I have an object with a method public boolean hasPermission(String role) { return permissions.contains(role); } I want to ... . How can I do 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 - NullPointerException: name == null

I'm developing an Android application that uses Fragments. I got this error. Caused by: java.lang.NullPointerException: ... how do I fix them? 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 do JOIN ON query using Criteria API

Since version 2.1 JPA supports join on. I found few examples how to use join on in JPQL but none for ... if yes, Can anyone provide 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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487 views

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java - Is setting up a server runtime necessary to generate a web service client with CXF in Eclipse?

When I go to file -> new -> other -> web services -> web service client in Eclipse and select the "Web ... CXF in Eclipse? 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 - Expand JList row height depending on content

I have a simple problem which totally drives me crazy. I have a JList, and would like its cells to expand ... of the JTextArea is displayed? 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 - @QuerydslPredicate throwing exception

I'm trying to understand how to use @QuerydslPredicate but my test API fails when it is called: Servlet. ... create a sample project here. See Question&Answers more detail:os...

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

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550 views

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java - How do I control the display of a JComponent's Tooltip?

I have a JComponent that's painting various shapes on itself. I'm detecting whenever the mouse enters one ... a custom tooltip mechanism? 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 I run JUnit tests during my Ant build script while omitting test classes from my resulting jar?

I'm using the Hello World with Ant tutorial from the Ant manual to learn about Ant. The last part of ... .Launcher.main(Launcher.java:109) See Question&Answers more detail:os...

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

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902 views

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java - iText 5 header and footer

how I can add in my PDF page the header and the footer? I wanna a table with 3 column in header ... on internet good examples. Thanks! Tommaso See Question&Answers more detail:os...

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

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625 views

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java - Possible lossy conversion from double to int

Why am I getting the Possible lossy conversion from double to int error and how can I fix it? public class BinSearch ... 't seem to do the job. See Question&Answers more detail:os...

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

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559 views

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java - Retrieving multiple textbox values with same name from JSP in Servlet

I am trying to pass values of textbox with same name from JSP to servlet but not able to accomplish this task. I ... "submit"> </form> </body> See Question&Answers more detail:os...

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

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463 views

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java - Self exploding and rejaring jar file during execution

I am currently working on a program to make sitting charts for my teacher's classroom. I have put all of the ... . Does anyone have any ideas? 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 is the access to a private field not forbidden?

For my study in the university I'm forced to do some ugly java basics, like working without encapsulation, main ... Method in the same 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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363 views

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java - Translucent JPopupMenu inside a Translucent Window - alternative?

I'm not sure if this is possible, but is there a way to safely allow popups to be translucent even when the ... ); window.setVisible(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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548 views

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java - How to (completely) deserialize json into a generic List?

When using an ObjectMapper to transform a json String into an entity, I can make it generic as: public <E> E ... ); // Doesn't compile } See Question&Answers more detail:os...

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

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367 views

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java - Pass xml document as parameter to xsl

I have read a lot of post and tried a lot of things but still can't get the xsl to find values in the ... .printStackTrace(); } return 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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378 views

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java - Spring Boot Data Rest + CORS not being enabled properly for OPTIONS/DELETE

I've got an extremely simple example that I can't get to work. I have my domain that models my database, and my ... } public void destroy() {} } 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 - Bulider Design Pattern to make generic method for methods having large number of parameters

I have an interface Itest and ClassA & ClassB are implementing this interface. testA & testB are methods in ... this using this design 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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860 views

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java - checkboxes gets unchecked in recyclerView upon scrolling

I have a cursor which retrieves a list of ingredients and populates an adapter, which is then assigned to ... suggestions would 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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608 views

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java - System.out.println to text file

I was searching a way to get System.out.println texts and save them on a .txt file, for example: System.out ... the output, any ideas? 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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514 views

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java - How to prevent closing of AutoCompleteCombobox popupmenu on SPACE key press in JavaFX

I have created a AutoCompleteCombobox in JavaFX with the help of code mentioned on https://github.com/jesuino/ ... handles SPACE key press. See Question&Answers more detail:os...

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

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