Recent questions tagged Java

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java - How can I get the filtered model?

I'm working with JTables to display information that users can filter, and if the user saves after filtering I ... that I'm filtering? 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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768 views

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java - Hibernate PersistentSet remove() operation not working

I've a Set in my Parent entity as below: Class Parent { @OneToMany(mappedBy = parent, cascade = CasacadeType. ... doesn't actually get removed. 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 - Iterating through method parameters

It's a simple and maybe trivial question: in Java how can I iterate through the parameters passed to the method ... must I write in that place? 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 - JavaFx WebView callback from Javascript failing after Garbage Collection

I am currently working on a JavaFX based application, where users can interact with places that are marked ... minimal example presented 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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java - Sending the DEFAULT placeholder via JDBC?

Is there any way, via JDBC, to send the DEFAULT placeholder explicitly, like in INSERT INTO sometables VALUES ... existing driver support 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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837 views

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java - HTTP response code 401 in Google GCM

Below is the exception I am getting even though my API key for server and browser application are valid. I ... reason and solution for 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 - Pending intent always make new activity

i trying to make app with nfc function. the problem is when nfc tag discovered, pending intent always make a new ... } } } return msgs; } 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 - Using abstract init() function in abstract class's constructor

I have something like this: public abstract class Menu { public Menu() { init(); } protected abstract void ... ? Thank you for answer. See Question&Answers more detail:os...

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

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734 views

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java - Copy and rename file on different location

I have one file example.tar.gz and I need to copy it to another location with different name example _test.tar ... exists. Can anybody help me? 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 - In the Circle Hough Transform, what is the Inverse Ratio of Accumulator Resolution (dp) and how does it affect circle detection?

The OpenCV documentation states: dp: Inverse ratio of the accumulator resolution to the image resolution. For example, ... it have a resolution? See Question&Answers more detail:os...

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

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716 views

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java - Store pictures in H2 database spring boot thymleaf

Good day. I want to store an image in an h2 database, then retrieve and display the same image in an html ... request part 'file' is not present 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 - SQLException: No value specified for parameter 1

I encountered the following error when I was executing my application: java.sql.SQLException: No value ... (ComponentStateHelper.java:182) See Question&Answers more detail:os...

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

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622 views

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java - Error while parsing XML file with StAx

I wrote a xml parser with StAx that I use to parse XML streams received from the server.Here is my ... forgot. Thanks for the documentation See Question&Answers more detail:os...

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

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714 views

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java - analyze jar file programmatically

I need to count the number of compiled classes, interfaces and enums in a given jar file programmatically (so I ... code is on the Pastebin. See Question&Answers more detail:os...

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

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920 views

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java - Swagger API Operations Ordering

How do I sort my operation by method alphabetically e.g. DELETE, GET, POST, PUT. I have read from this post ... I still cannot make it work. See Question&Answers more detail:os...

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

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797 views

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java - merge two regular expressions

I have two regular expressions, one pulling out usernames from a csv string, and the other pulling out emails. ... how difficult it would 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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629 views

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java - new Date(long) gives different results

When I run this code: System.out.println( "XXX date=" + new Date( 1311781583373L ) ); I get this result in ... can I force Java to use either? 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 - ImageIO can't read input file

public static void imRes(String pat) { try { BufferedImage bckimg = ImageIO.read(new File("c:/s/deneme.jpg")) ... (imReTest.java:6) 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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643 views

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java - How to prepend to a file (add at the top)

Imagine you have a file sink("example.txt") data.frame(a = runif(10), b = runif(10), c = runif( ... how other languages approach 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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687 views

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java - Replace string with part of the matching regex

I have a long string. I want to replace all the matches with part of the matching regex (group). For ... <, ]", Pattern.CASE_INSENSITIVE); See Question&Answers more detail:os...

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

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644 views

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java - Why should I call close() on a ResultSet and Connection instance?

When I don't need to use instances of those ResultSet and Connection anymore in my program, why should I call the . ... any) of not doing so ? See Question&Answers more detail:os...

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

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830 views

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java - Arrays.asList() Confusing source code

According to this source code for the Arrays class, the method asList passes an array to the constructor of new ... ArrayList<T>(a); } See Question&Answers more detail:os...

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

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839 views

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java - How to avoid IntelliJ to reset language level?

I am having troubles with this which have been answered dusin of times on this site. My take on the ... : release version 5 not supported See Question&Answers more detail:os...

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

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616 views

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java - Good patterns for unit testing form beans that have annotation-based validation in Spring MVC

When using annotation based validation for a form bean, what is the best practice for unit-testing those beans ... the right track in general? See Question&Answers more detail:os...

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

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734 views

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java - How to get comma between Freemarker list

I am iterating a java list in freemarker , but I want commas in between the words. Here's my code <#list key_list[ ... ,c,d How can I get that See Question&Answers more detail:os...

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

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722 views

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java - Generate minimized jar with only used classes

I'm in need of creating the minimal jar of utils library for use in Android. I'm using some methods from apache ... tool that will do the same? See Question&Answers more detail:os...

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

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646 views

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java - How can I set up a simple gradle project that uses sqlite4java?

I'm starting a simple java test project using sqlite4java and building using java. I can get the core ... me distribute anything easily later. See Question&Answers more detail:os...

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

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826 views

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java android getResources().getIdentifier()

How do I get the int id value from R. for an id? When I use getIdentifier its just returns 0 ... public static final int left_drawer=0x7f090002; See Question&Answers more detail:os...

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

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