Recent questions tagged java

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i have two classes in java as: class A { int a=10; public void sayhello() { System.out.println("class ... : A cannot be cast to B 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 - Change JFreeChart Histogram colors dynamically?

I'm trying to show the histogram of an image and show only some colors. I've already done that with JFreeChart ... Is there anyway to fix 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 - Can't build a gluon project for mobile using gradle

I followed the instructions on http://docs.gluonhq.com/charm/4.0.1/#_getting_started. I'm using eclipse 4.5.2 and ... android. How do I 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 - Display an ASCII diamond with nested for loops

I am trying to display a diamond of asterisks using nested for loops. Here is my code so far: public class ... at 7 asterisks and 2 spaces? 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 - Assign a subclass of a Generic class to a super class of this class

I have couple of supplied interfaces public interface Finder<S extends Stack<T>,T extends Item> { public S ... in the implementation as well. 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 - logback create log files inside folder having name as current date

In my current project i want to create log files date wise i.e. log files should reside inside folder having ... > </encoder> </appender> 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 - WebView NOT opening android default video player?

when I view this page on my android device' default web browser and click the first video, it triggers the default ... -for-android/"); } } 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 custom css cursor

I am searching the web but i can't find how to set a custom cursor in javaFX with css , i know how to do ... to create a costume one with css? 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 - JDBC Select batching/fetch-size with MySQL

I have a Java application using JDBC that runs once per day on my server and interacts with a MySQL database ... share the same physical memory. 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 a component from a JTextPane through javax.swing.text.Element?

I am using a JTextPane to display characters and symbols, where the latter are represented by custom painted ... from the text pane? 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 - JasperReports: Can't locate subreport

It's drives me crazy.. Last hour I am trying to figure out why my report stopped to worked right after I ... valid/path/sub.report.jasper WHY?? 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 retrieve the last document in a firebase collection. I would also like to get the document fields value

How to retrieve the last document from a Cloud Firestore collection? I would also like to get the document fields ... Here this the image below: 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 wait for a JFrame to close before continuing?

My program consists of 3 main 'sections'. Main function, Login form and App form. The main function should ... please, what would you suggest? 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 - Change expand and collapse image TreeView JavaFX 2.2

Is it possible to change the Expand and Collapse Images of a JavaFX 2.2 TreeVIew? Change this image, To an image like this (with +/-), 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 - Generic types in annotations

Consider the following code: import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; public ... clear reason why? See Question&Answers more detail:os...

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

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143 views

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java - Incorrect parsing of date strings in SimpleDateFormat

I'm trying to convert a string formatted date in UTC to a date object which is resulting a conversion that is ... Any idea what is going wrong? See Question&Answers more detail:os...

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

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118 views

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java - Is there a way to populate a map in JSP?

For example <jsp:useBean id="total" class="java.util.LinkedHashMap"/> // need somehow do something like this: ... but a little bit ugly) 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 deploy the same web application twice on WebLogic 11g?

We have developed a JEE5 web application (WAR) and running it in production under WebLogic 11g (10.3.5). Now the ... a better way to solve 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 - XMLStreamWriter writeCharacters without escaping

How do I use XMLStreamWriter to write exactly what I put in? For instance, if I create script tag and ... single quotes surrounding 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 - How to update the same EditText using TextWatcher?

In my Android application I need to implement a TextWatcher interface to implement onTextChanged. The problem I have ... achieve 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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302 views

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java - JPanel said to be opaque what does that mean?

In Swing JPanel said to be opaque, what does that mean? Also how JPanel VS JComponent compared in relation to ... in advance 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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241 views

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java - Set the text color of calendar view month name

In android , i am using an default CalendarView. I have set the background to light gray color. But can i ... of month view of calendar view? See Question&Answers more detail:os...

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

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228 views

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java - android-support-v7-appcompat library project won't work

I am trying to add Support Library v7 to my clean android project as support library (with resources). I followed ... too. 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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172 views

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java - Why is the ObjectFactory not used during unmarshalling?

I have defined the following ObjectFactory: @XmlRegistry public class ObjectFactory { public Dogs createDogs() { return ... here and 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 - JTextPane doesn't display JScrollPane and doesn't Wrap Text

I need to display links so I'm using JTextPane with setContentType. However, the content doesn't wrap and there's no ... ); } } My result: See Question&Answers more detail:os...

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

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168 views

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java - Can CSS in Javafx be used for animations?

Here is the link to the animations in CSS https://daneden.github.io/animate.css/ Can you use these in Javafx? See Question&Answers more detail:os...

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

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119 views

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java - Specifying the location of Canvas in Swing

I'm learning Swing GUI design. One thing I haven't quite sorted out is how to add an add a Canvas to a ... inst1 = new frame_class2(); } } 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 does this class behave differently when I don't supply a generic type?

I don't understand why this confuses the compiler. I'm using the generic type T to hold an object that's not ... .get(String.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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