Recent questions tagged JAVA

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java - Online algorithm for calculating standard deviation

Normally, I have a more technical problem but I will simplify it for you with an example of counting balls. Assume ... the final array in hand? 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 - Trying to run trivial Android JUnit tests. Getting: "Test run failed: No test results" What am I missing?

I have never used JUnit before, and now I'm trying to set it up on an Android project. My project under test is ... let me know and I'll update. 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 - RESTeasy client code for attaching a file

I need to attach a file to my service end-point . I tested the functionality via POSTMAN ( chrome browser plugin to ... code to attach a file ? 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 compare two ArrayList<List<String>>

I want to compare these two ArrayList: public static ArrayList<List<String>> arrayList1 = new ArrayList<List< ... return true, otherwise false. 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 - Subclass constructors - Why must the default constructor exist for subclass constructors?

Given a random class: public class A<T> { public T t; public A () {} // <-- why is this constructor ... <init> Can anyone explain why this is? 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 I add a method to a class from a compile time annotation?

If I create a custom annotation (example: @SaveFuncName("saveMe") will add a method called saveMe() with some ... only create a different 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 - NFC reader "SELECT (by AID)" APDU is not routed to Android device

I have an ACR122U NFC reader/writer connected to my Windows machine with ACR122 driver installed. I try to use javax. ... 9000 (-> PN532 v1.6) 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 check if a SD Card has been inserted to the tablet or not : Android?

I am working on a simple app, which should be able to access files from internal storage and as well as ... very much appreciated. 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 - read html body of an email using javamail

I am trying to get the contents of an html email including the tags etc. right now my code only returns the ... } any help would be appreciated. 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 - Calculate on which side of a line a point is

I need to figure out how to calculate on which side of a line a point is. I'm searching a really fast ... needs to be diagonally. Any ideas? See Question&Answers more detail:os...

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

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270 views

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java - JProgressbar: how to change colour based on progress?

Is it possible to be able to change the bar colour depending on the value of the progress? I tried the ... possible or are there alternatives? 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 - open pdf file in new window using servlet

I am generating a pdf file for gate pass from my web application through servlet. I want to open this newly generated ... .flush(); os.close(); 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 - Binarize Image in Android

I am developing android app that uses tesseract OCR to scan a text from image, I heard that binarizing image before ... to find one. 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 - Export JPanel to vector graphics

I would like to export the image in my JPanel to a vector graphics file so it can be edited and printed at a ... format would be best, and 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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351 views

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java - How to do Distributed Transactions XA in Spring and GlassFish 5?

I am trying to create a transaction comprising two REST web services, whose data source point to the same data base ... for your help and time. See Question&Answers more detail:os...

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

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266 views

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java - How to prevent memory leak in JTextPane.setCaretPosition(int)?

I'm working on a Java application with Swing-based GUI. The application uses JTextPane to output log messages ... no indication of memory leak: 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 - Future.cancel() method is not working

The code that I have creates a Callable instance and using ExecutorService a new thread is being created. I want to ... ; 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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java - How to pass a system property to a web application hosted in Tomcat 7 running as a Windows Service?

There are numerous places on the Internet, suggesting that it is easily achieved by any (or all) of the following ... tell me how 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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324 views

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java - Nimbus and alternate row colors

I don't understand how alternate row coloring works in Nimbus. It seems just crazy!!! I would like to clear ... jFrame.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 - JXDatePicker using SimpleDateFormat to format dd.MM.yy to dd.MM.yyyy with current century

as already explained I want to achieve, that when the user is editing a date within a JXDatePicker, he can ... very much in advance. ymene See Question&Answers more detail:os...

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

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384 views

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java - Does the Android API support KML files?

Is there a way in Android to load KML files from Google Earth into a map widget? Specifically I am looking ... anybody ever tried this before? 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 connect NetBeans to MySQL database?

I have just installed NetBeans 7.0 and I am a newbie in NetBeans' world. can any one tell me how to connect ... Postgres ? I work on Windows XP. 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 - Hide .jsp extension or change display name on URL

How to hide .jsp extension or change display name on URL? I'm using servlet-jsp communication. my web.xml ... to ..../SciArchive/publications See Question&Answers more detail:os...

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

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264 views

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java - Writing contains() for a generic collection

I'm writing a skiplist class in java as an excercise. I've written a class called SkipListInternal<E> which contains ... , how should I 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 - Strange problem with timezone, calendar and SimpleDateFormat

Let's consider the following code: SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss dd/MM/yyyy", Locale.US); ... 'm using Java 1.6.0_14 See Question&Answers more detail:os...

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

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401 views

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java - Max size for StringBuffer

Why would the StringBuffer have a limit on its size? I went through some of the links : http://www.coderanch. ... Why would it throw an 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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230 views

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java - Launch screen from native background service

I have a simple Flutter app that start a native background service using MethodChannel. This native background service ... C# for IOS side. See Question&Answers more detail:os...

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

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367 views

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java - Maven: Different property files for different profiles

I'm using different maven profiles to deploy my application to different environments. (With the weblogic-maven- ... to solve this problem? See Question&Answers more detail:os...

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

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