Recent questions tagged Java

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java - can anonymous inner classes extend?

I want to create an anonymous inner class that extends another class. What I want to do is actually something like ... ; } } Is this possible? 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 - Google Play Games

Good day everyone. I'm trying to implement Achievements in a game I'm developing. I already set everything on ... be wrong? 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 - Intellij tomcat local run configuration - what happens behind the scenes?

I've been using tomcat run configuration without any problems - it does a excellent job. However I kind of don' ... are the logs and conf files? 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 - Make FileAlterationObserver to observe remote directory

How to make FileAlterationObserver to observe a remote directory? This can accept a String path or a Java File. ... ("remote directory path"); 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 - Can we put combobox, radio button, text field, table on text area?

I need this type of functionality. Like in MS Word, we choose table in menu bar and then we draw in our ... for sheet I can use JTextArea. 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 - When to use field variable?

Under what circumstance would you use field variable instead of local variable? I found it a bit hard to ... another method. Thanks, Sarah 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 can I set an optional RequestBody field without it being deleted when I make the call?

I have a small program in spring-boot which through a get call having a @RequestBody returns me a message with ... and therefore fails to 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 - The concept for one-to-one mapping. Explain the mapping

How to define a One-to-One relation between 2 classes ? I think I am going wrong somewhere,conceptually. I don' ... this.name_pm = name_pm; } } 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 Recursion to reverse an integer without the use of strings

I have been trying this for some time now but could not get it to work. I am trying to have a method to ... me to fix the problem. 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 - Android Broadcast receiver for call not working? (Marshmallow)

I am trying to display toast after receiving an call, I have implemented all necessary things needed to register ... label saying Hello 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 - MySQL blob to Netbeans JLabel

I have a blob type field in my MySQL, I want to put the data in this field in JLabel as Icon. For example ... } picture is the name of my jlabel 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 - Images won't load if they are of high size

I am storing images in DB using MEDIUMBLOB. When I try to load image through a servlet, I am able to see those ... </servlet-mapping> </web-app> 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 know the reason for JVM crashing with Segfault?

We are seeing the JVM getting crashed at times with segfault. The only error we see in logs is as below. ... point in tracing this error. See Question&Answers more detail:os...

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

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536 views

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java - How to pass Date as parameter to jasper report

I am trying to create JR report which is taking start_date and end_date as parameters. The query: SELECT * FROM ... put("joining_date", to_dte); 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 XML from HttpServletRequest and use into endpoint

I would like to get the XML data from request and response and use it into Rest controller. I tried this: ... how I can assess the 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 - Couldn't get connection factory client

everything is working fine but the problem when i am map a location nothing nothing happen i registered my google ... help ? 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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307 views

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java - Gluon Sample Project with JDBC doesn't work on iOS Device

i have simple code with Gluon + JDBC. I can connect this code on Android Device but not on Ipad. my ... working on Ipad? thanks erkan kaplan 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 - Selecting Password row and Pasting in notepad reveals the password

I have been facing the above mentioned problem in my java application that I recently created. Even though I clearly ... will be of great help. 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 Swing timer to perform few tasks one after another

I am perfectly aware very similar questions few asked before. I have tried to implement solutions offered - in vain. ...The ... (); } } } }); 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 set up a JFrame with a refresh rate?

I have a 2d game which the entire structure is completely coded except the graphics. I am just updating the single ... up a JFrame with 25FPS? See Question&Answers more detail:os...

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

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433 views

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java - iText API for PDF comparison

Can I use iText API for comparing two PDF files? I have gone through various approaches on stackoverflow for ... accomplish this through iText? 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 - When does StringBuffer adds strings to the String Pool?

When I define a StringBuffer variable with new, this string is not added to the String pool, right? Now, when ... become a string-pool string? See Question&Answers more detail:os...

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

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454 views

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java - I get: Error:Execution failed for task ':app:transformClassesWithDexForDebug'. when making Google maps App

I followed the instructions in this link: https://developers.google.com/maps/documentation/android-api/start to make a ... [0, 0xffff]: 65536 See Question&Answers more detail:os...

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

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428 views

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java - Passing the click event on one jPanel to another JPanel

I have one outer panel, in the outer panel I have another jPanel placed on it. if i do a right click on ... from one panel to another panel? 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 prevent JLabel positions from resetting?

I have a JPanel that contains 11 JLabels, each of them registered with a MouseMotionListener like so (generated by ... no issues with clicks. See Question&Answers more detail:os...

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

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503 views

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java - Cannot open SQLite database from SQLIte Helper Oncreate, when OnCreate is triggered by opening database for the first time

When the mainactivity tries to open the database for the first time after the app is installed, the SQLiteHelper ... Is this a threading issue? See Question&Answers more detail:os...

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

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557 views

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java - Struts2 s:if test for non-null value

I am wanting to test for a non-null value using a struts2 tag. This works if I use the following: <s:if test=" ... "!= null" in the above test? 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 doesn't appear when I click on button

I see no output for this code in panel, but in console points (X,Y) come out. I searched more and more and ... ()); } return signalData; } } See Question&Answers more detail:os...

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

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