Recent questions tagged java

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java - JPanel doesn't response to KeyListener event

I have a subclass of JFrame that uses a class extended from JPanel public class HelloWorld extends JPanel implements ... respond to key press? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Loop through all childs of GroupView?

Here is my code: Typeface font = Typeface.createFromAsset(getAssets(), "fonts/choco.ttf"); ViewGroup rootView ... references to the TextViews ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to connect JProfiler to an application running on localhost?

I have an application running on my localhost and I want to profile the application to see how can I enhance the ... find session with id: 117` See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Disable Chrome notifications (Selenium)

I just want to disable Chrome notifications in the Chrome opened by a Selenium Java application. (using java code ... 's window is closed. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to specify which @Tag should be used for JUnit in IntelliJ IDEA

Is there a way to specify from the build in JUnit5 Runner of IntelliJ that only test methods with specific @Tag ... UI? Best regards, Dieter See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do I show an alert dialog only on the first run of my application?

I have an alert that I want to display only the first time right after starting the application for the first time. How can I do that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Better way to signal other thread to stop?

Started several worker threads , need to notify them to stop. Since some of the threads will sleep for a while ... to do this? Thank you. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Error Occured in jasperReport File

First I make one R_D1.jrxml file in iReport 5.1.0. My Java code to execute the report looks like: import ... , or what this exception means. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Adding Buttons inside cell of JTable along with data?

Is it possible to add buttons inside the JTable cell along with data? What I am trying to do is to create a table ... 3 and 1 if pressing [-]. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android parsing String to Date time with SimpleDateFormat

I have the String 11/08/2013 08:48:10 and i use SimpleDateFormat("MM/dd/yyyy HH:mm:ss") and when im ... e) { e.printStackTrace(); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - creating huge BufferedImage

I'm unable to create a huge BufferedImage (lack of memory is not the problem). Does anyone have any ideas? ... .<init>(BufferedImage.java:315) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to split the strings in a file and read them?

I have a file with information in it. It looks like: Michael 19 180 Miami George 25 176 Washington William 43 ... I'll appreciate help. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Force Hibernate Insert Without Select Statements

I am attempting to insert a new record into a table that I know is unique before hand. I have tried ... do any SELECTs before it INSERTs? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Do I have a JAXB classloader leak

I have an application deployed on Glassfish. Over time the number of loaded classes climbs into the millions and my ... how do I resolve it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JavaFx Event argument type mismatch

I using JavaFx for first time and I encountered a problem with events. I built a form with SceneBuilder ... would really appreciate any help. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to use the PropertyValueFactory correctly?

I am trying to make a table with a TableView and fill it programmatically based on a list of User objects. ... .addAll(name, rank, netMerits); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - load spring bean into a servlet

There are many documentations out there on how to achieve this task but I still couldn't resolve my issue. I'm new to ... ); } thanks a lot! :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Reasoning behind having to specify L for long, F,D for float, double

A few related questions here. As per the title, why is it a requirement if we are specifying the variable ... - to ensure highest precision? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do I set priority on Spring MVC mapping?

I have 2 spring controller mappings: @Controller public class ContentController { @RequestMapping(value = "**/{content}. ... I can specify that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can i set a jFrame to be always on top and focuse enabled until it is closed?

There are two different Frames in my program and the second one open when i click the jButton is the first frame,so ... . how can i do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why does f:validateDoubleRange only work for @SessionScoped?

Can someone explain to me why Foo in my example is always null when it gets to the validateDoubleRange class? The ... at the end of your URL. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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542 views

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java - JScrollpane needs to shrink its width

I have a JScrollpane that has a JPanel on the inside (and the panel contains some JLabels). I want ... shrinks the scrollpane too small. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Towards the "true" definition of JAVA_HOME

As a Java developer who switches between *NIX systems (OS X, Ubuntu, ...), although I can always "get" my ... is precise enough to be useful. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to convert an Optional to an OptionalInt?

I have an Optional that I want to "convert" to an OptionalInt, but there doesn't seem to be a simple ... can make the conversion more elegant? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - One step check for null value & emptiness of a string

I have a setter method. Then when another (say generate) method is run, I need to check the value of my ... setters for a programmer to do! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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189 views

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java - why it is so slow with 100,000 records when using pipeline in redis?

It is said that pipeline is a better way when many set/get is required in redis, so this is my test code: ... JIT since I don't understand it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - getClass().getResource() always returning null

I am trying to set the URL of an image that is located in my resource folder in my src folder. It is ... rebuild. It worked after that fix. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why is Scanner slower than BufferedReader when reading from input?

I understand what is Scanner good for, and also when to use Scanner and when BufferedReader. I read a different, ... with scanner it is slow. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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