Recent questions tagged Java

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java - Why am I getting ResultSet is closed error when I never closed any

I have this error in my code and have checked and edited it thoroughly, yet I still get same issue. I also use ... no idea on any solution now. 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 while running Mapreduce(yarn)from windows eclipse

I am running a WordCount program from my eclipse. I tried with Hadoop1.x it is running fine. Facing issue ... attempt.. Failing the application. 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 - Timeline for parabolic trajectory in JavaFX

I'm sorry, but I continue not understanding. My problem is I know nothing about physics but my teacher ... standstill. Please, help meeee 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 custom cursor in javaFX?

I am trying to create custom cursor in javaFX. Here is my code: Image image = new Image("mycursor.png"); Pane ... for windows 8.1 does not work? 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 - Spring-MVC : Creating a good infrastructure(configuration) and avoiding duplicates

I am working on a Spring-MVC application since some time. Recently I ran into some problems with @Scheduled methods, and I ... "sectionDAO"/> </beans:bean> <!-- Group Section beans...

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

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java - How do you rotate a 2D array 90 degrees without using a storage array?

I was instructed not to use a storage array to complete this task. Basically, we have to create a function ... this without a storage array? 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 - Funny Shell Output: [01;32mtestfile.txt[00m instead of testfile.txt

Question: I'm getting "funny" character output from commands I send when using a ChannelShell and I'm wondering ... has the characters. 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 - Firestore : Query all the elements in array in android

I have a data structure like /Split // Collection {authid} // Document /SentIvitation //Collection {auto- ... in firestore without any indexing? 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 - Press home button to stop service

i want to if the user press home button my service will be stop , this is my code but it's not working ... .onKeyDown(keyCode, event); } 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 - Making games with JNativeHook

I'm working on a simple overlay program for PC games. It's just a transparent rectangle positioned in the center of ... (new Main()); } } 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 - Server based SwingWorker does not Stop

I have a boolean variable to control the execution of the server (start/stop) : private boolean ecoute=true; here ... new ... any suggestion ? 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 fix “unsupported class file major version 60” in tomcat9?

I have a maven project. It's written in Java 16. I have the Java 16 JDK installed. When I build it with ... .2+7-67, mixed mode, sharing) 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 - checked exception for 'throws' in overridden method

I was practicing exception handling mechanisms with method overriding in java...My code is as follows: class base ... of an overridden method? 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 - Two JPanels in one JFrame

I want to use two JPanels in one JFrame, with an invisible horizontal line between them. I played a little bit ... I am relatively new to Java. 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 - Struts 2 - HTTP Status 404 - No result defined for action

I'm trying to develop a Struts2 app where an action is invoked upon clicking a hyperlink which directs the user to a ... "); return SUCCESS; } } See Question&Answers more detail:os...

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

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631 views

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java - Jersey-request for authentication

I have a working JavaEE 6 web application on Glassfish, this application already has a JSF frontend and has ... dont need anything like 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 - Azure Functions - How to use the `MultipartHttpServletRequest` class from the default `run()` method?

public HttpResponseMessage run( @HttpTrigger(name = "req", methods = {HttpMethod.GET, HttpMethod.POST}, authLevel = ... Please click to enlarge) 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 - NullPointerException when accessing a cell with Apache POI

I am trying to read an Excel file with Apache POI. My goal is to get the cells 2 & 3 from every row and ... row = sheet.getRow(rowNumber); } } 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 - My own JButton preferred size is not working correctly?

If I want to create my own custom JButton and i want to set the preferred size how do I go about doing this ... ); setBackground(Color.RED); } } 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 - Parsing a String with a GMT timezone to Date using SimpleDateFormat

I'm having problem parsing the Date from an input string that is of the following format: String input = " ... a standard, valid input 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 - Read KeyPair's publickey in RSA OpenSSH format?

I've created a KeyPair in Java by doing the following: KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA") ... -----BEGIN ? 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 Snap to Roads Google Map in Android Studio

Hello I would like to ask how to add Snap to Road when I have the route given by google map API. I have ... /snap my project is look like 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 - Using a pagination with Struts 2 and Hibernate

I'm looking for ideas to implement a pagination with Struts2 and Hibernate. My table contains too many lines ... PREVIOUS and NEXT buttons. See Question&Answers more detail:os...

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

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443 views

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java - How should I select which concrete implementation should be instantiated based on the user choice?

I have an interface Fruit with two implementations Apple and Banana. I want to create a Fruit instance. ... Abstract factory" design pattern? 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 third-party jar files into my android application jar file?

I have an Adobe AIR application for Android. Using for this AIR 3.0 and Flash Builder 4.6. I need to ... content/Context;Ljava/lang/String;)V* 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 display image which is outside server directory in strtus

This question is continuation to my previous question Accessing External Files Into Our Web Application, actually ... resources/images/img1.jpg See Question&Answers more detail:os...

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

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760 views

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java - Android Bitmap from URL always null

I'm trying to download an image from a URL and convert it into a bitmap, but the line Bitmap myBitmap ... "></activity> </application> See Question&Answers more detail:os...

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

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610 views

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java - Change contents of BufferedImage, then update JFrame to reflect it

I am trying to make a Mandelbrot Set renderer with a GUI where you can click and drag to zoom into a specific area. ... .repaint(); } }); } } See Question&Answers more detail:os...

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

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