Recent questions tagged Java

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java - Properties file backslash and semicolon

I have a Java class to write/append into existing properties file. After appending, it's replacing all ... remove these extra backslashes? 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 Issue with NeighboringCellInfo, CID and LAC

For a while I was trying to get CellID and LAC of near base stations. Unfortunately I did not manage ... nothing happens. Updated source code. 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 - add component to jpanel on runtime

I have a JPanel and JButton on the JFrame. on runtime add JLabel to JPanel When click JButton. I use of the ... no display any JLabel in JPanel. 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 - updating object with spring data mongodb and kotlin is not working

I have the following request handler fun x(req: ServerRequest) = req.toMono() .flatMap { ... val oldest = ... Why is this block() required? 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 - PrintWriter to append data if file exist

I have a savegame file called mysave.sav and I want to add data to this file if the file already exists. If the ... Can you help me? 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 - javax.servlet.http.HttpServletResponse.getStatus() not found

I am working with an embedded Jetty server, deploying a Jersey REST api, and I am trying to log the errors, ... server.start(); server.join(); 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 - Browsers keeps sending NTLM token instead of Kerberos - How to solve it?

I can't seem to correctly configure the system and have the browser send a kerberos ticket to the ... setName(Constraint.__SPNEGO_AUTH); final String domainRealm = _config.getStrin...

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

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java - JPopupMenu on JTable -> Get the cell the menu was created on

I have a situation where I have a popup menu created when a JTable is right clicked on. Standard way of creating ... ideas on how you do 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 - Shortest path in 2d arrays

*...*..D .G..*..... **...**. .S....*. ........ ...G**.. ....... ... shortest pathi in java Only Horizontal and Vertical movements are possiable 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 - Set Jtable/Column Renderer for booleans

Right now my Boolean values for my JTable display as JCheckBoxes. This would normally be fine but I would like to ... lets do a String first... 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 - Preventing SQL injection without prepared statements (JDBC)

I have a database log appender that inserts a variable number of log lines into the database every once in ... client side prepared statement' ? 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 - Fire a JButton with spacebar, or enter key, or mouse click

I'm trying to get a simple JFrame with a single button to fire an event when any of these events ... (JFrame.EXIT_ON_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 - Setting variable inside onDataChange in Firebase (singleValue Listener)

This is just an example of what my code is like. Right now, if I print out the userName variable inside ... Thank you to all who answered. 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 - float number is not the expected number after subtraction

I have the following statement: float diff = tempVal - m_constraint.getMinVal(); tempVal is declared as a float and ... number. how to do 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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java - Configuring Tomcat to use Windows Certificate Store for SSL

I've deployed a number of SSL configurations, including both Tomcat (cacerts + keytool) and IIS (Windows ... vs. having multiple stores. 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 - Perfoming Cartesian product on arrays

I'm interested in performing a Cartesian product on n arrays. I can write the code if I know the number of ... that I can do this? 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 - How to create an arraylist class that can store multiple objects?

I am a self-learner. Currently, I am making a GUI project in which I need a matrice-type database. I would ... ; import java.util.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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java 8 - Should I use Stream API for simple iteration?

Are there any benefits in using the new Stream API for simple iterations? Without Stream API: for (Map.Entry<String, ... (e.g. in performance)? 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 - Need to implement RESTful web services in Struts2 and Spring

I am currently working on a web application that is based on Strtus2, Spring, open JPA and LDAP. Now client ... direction to start this thing. 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 - Error when trying to connect to Jacorb naming service

I'm hoping to get some help with this weird problem. We're running the Jacorb name server and I have a ... any help or advice anyone has. 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 log(1000)/log(10) isn't the same as log10(1000)?

Today, I came across quite strange problem. I needed to calculate string length of a number, so I came up with ... , because it has 3 digits. 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 - CriteriaQuery month and year filter

I'm trying to make a criteria query (JPA/Hibernate)in a model which contain one column with date (Oracle ... appreciated, 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 - How do I flip an image horizontally flip with glReadPixels() Bufferedimage and out put with ImageIO?

How do I flip an Screenshot image? I can't find my problem anywhere else. Example code: /* *@param fileLoc // ... ();? Thanks in-front, Rose. 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 - Are JPA and Hibernate entity identifiers reset to null after a rollback?

What happens with Entities in session if I make rollback ? Do they get back to the state before transaction ? In ... entity has become a new id. 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 - Jsoup: Extracting innertext from anchor tag

Here's my problem. I have a html content: innerText I need to extract the "innerText". While trying this in ... " moved outside the anchor tag? 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 - Changing a specific byte in a file

I am trying to write a java function that will change 1 byte in a large file. How can I read in and write ... I get a force close every time. 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 button for adding new tabs near last tab?

Does anybody know how to add a button for adding new tabs that is positioned near the last created tab? If ... . I'm using MyFaces+PrimeFaces. 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 create own annotation for junit that will skip test if concrete exception was thrown during execution?

My application have several execution modes, and in 1 mode it is normal that some of my tests will throw a concrete ... } } }; } }; @Thx See Question&Answers more detail:os...

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

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