Recent questions tagged java

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Here as you can see I used TabLayout,TabHost. I used TabLayout in first twice pictures. In third picture ... those layouts from MainActivity. 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 - Returning a Collection<ChildType> from a method that specifies that it returns Collection<ParentType>

I'm trying to write a method that will return a collection (eg Arraylist) that is declared using generics as ... that extend a certain 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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java - Firebase Android - Only need specific table to be in local device

I am using Firebase realtime database in my Android application. I have replica of database in local device ... read from global database? 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 Gson treats every JSON local file as a string even when its not

I am constantly getting Expected BEGIN_TYPE but was STRING at line 1 column 1 path $ error. I've read about ... if it begins with brackets. 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 - getting the right image observer for rotating an image

So Im drawing a BufferedImage 'bird' but I want to rotate it according to the angle that it is falling. ... else would I achieve this rotation? 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 JMenuBar is not place in the JFrame content pane, but JToolbar place in the content pane

Why JMenuBar is not place in the content pane?is there any reason or effects when make a java gui program especially when using jframe? 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 - fitting PrinterJob Object to specific print format of BufferedImage

Im using PrinterJob object in order to print my Bufferedimage, I have a BufferedImage which I proccess and ... mistake calculating ? 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 - Move JButton with keyboard Arrows inside a Grid Panel

i want to make a JButton that can be moved with keyboard arrows inside a grid panel. Any ideas on how to make ... } }); Thanks for your 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 - DateFormatter is not printing value in the given format

My date-time format string is : yyyy-MM-dd'T'HH:mm:ss.SSSZ I am using DateTimeFormatter from Joda Time to ... as specified in the string format. 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 add multiple items in list - decision table - Drools

I need to create a new multiple instance of objects for the Pojo class in drools decision table. I have ... to achieve the expected response? 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 Draw some shape on JPanel using ActionListener?

I'm practising to draw a shape on a JPanel by clicking on a Jbutton, but I cannot. It's been five hours ... = e.getActionCommand(); } } 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 images fetched from server display in real time

I have many images that get fetched via a series of threaded HTTP network calls. I'm using Callables and ... } executorPool.shutdown(); } 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 call MethodInvoke - reflection

If i have a method which takes a int[] as a parameter and i wish to call method.invoke on this then do ... i seem to be getting errors? Regards 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 ViewTreeObserver i am adding setMaxLines and setEllipsize in MaterialTextView inside RecyclerView.Adapter

I am set MaterialTextView inside RelativeLayout and set RelativeLayout size programmatically different size for every device. Then ... ); } } } 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 - Cannot add checkbox to the JList

I'm very new to programming, and I can't add JCheckbox to the JList. There is no error but nothing is ... add(pane); f.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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java - Draw in an image inside panel

I have a panel with two buttons. I'm trying to insert an image inside the panel and I want to draw lines ... code worked in my other 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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java - Add an actionListener to a JButton from another class

so I have two classes testPanel and testFrame. All the buttons are in the testPanel class. I want to add ... new testFrame(); } } 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't deploying War file : error in opening zip file

I'm working on a web application based in java which is correctly running in local with Jetty but I can't deploy a ... :88) ... 17 more 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 make a Python script an executable program

To be clear, not just "run python scripts" But to make my python script a "executable" or " ... program with several parameters accepted? 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 - HK2 IterableProvider named method not finding Implementation

I have a problem trying to inject a contract with two services bound to it. I'm using Jersey, and extending ... Thanks a lot for your 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 - What does the String classes compareTo() method return

In the Java API on oracles website: "compareTo Returns: "the value 0 if the argument string is equal to this string ... "abc" is it returning 1? 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 - Transparent JList in JScrollPane all in one class

I have a JFrame in which I have drown a background: class ImagePanel extends JComponent { private Image image; ... components in one 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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java - Click a button to open a new JFrame / GUI,

I seem to not be able to find a way to get my code to work. I am making a program and until now ... need something more 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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java - LibGdx-ViewPort width and height does not match for some devices

I am using a Viewport for my libGdx landscape game like this. public static final int WORLD_WIDTH = 1280; ... need to change the viewport? 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 put actionlistenerand actioncommand to multiple jbuttons

so i want my buttons to be labeled 1-9 but I dont want to list out all the action listeners and action ... swing so its abit confusing still 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 use replaceFirst to Replace {....}

I am having a string which contains xyaahhfhajfahj{adhadh}fsfhgs{sfsf}. Now I want to replace {string} with a space ... the regex for doing 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 - How I can represent this relation in class diagram?

I made a Java application where each class performs a processing and at the end it creates an instance of another ... that with a class diagram? 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 deal with ConcurrentModificationException

I am getting the a ConcurrentModificationException from my cooldown timer. I use a thread to reduce the values every ... of the for loop... See Question&Answers more detail:os...

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

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