Recent questions tagged Java

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java - How to get all possible combinations from two arrays?

I have the two arrays: String[] operators = {"+", "-", "*"}; int[] numbers = {48, 24, 12, ... in 4 pairs. The duplicate is different. 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 Boot customize http error response?

How can I customize the response status code and the data in the response body if an exception occurs in a Spring ... ": "Bad things happened" } 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 - No persistence exception translators found in bean factory. Cannot perform exception translation

I'm getting following exception after migrating to Spring Framework 3.1.0 RC1 with Hibernate 4.0.0 CR7 2011-12-08/11 ... .java:522) ... 18 more 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 can I get Date in MM/DD/YY format from Timestamp

I want to get the Date in MM/DD/YY format from a timestamp. I have used the below method but it does ... which is used in my 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 - Sonar complaining about logging and rethrowing the exception

I have the following piece of code in my program and I am running SonarQube 5 for code quality check on it ... true; } return validUser; } 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 - Dagger 2: Provide same instance between multiple Component with same Scope on different library modules

I have a Core Android Library where I'm defining a CoreComponent ad using the @Singleton scope to inject instances ... with the same Scope? 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 - Copying Excel Worksheets in POI

Does anyone know of a means to copy a worksheet from one workbook to another using POI? The Workbook ... work when copying between workbooks. 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 - Does an ExecutorService get garbage collected when out of scope?

I'm asking this question because I am creating a lot of executor services and while I may already ... once BaseConsumer#accept has finished? 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 - little endian DataInputStream

Is there any way to force DataInputStream to read little-endian data?? Thx PS. Doing byte-buffer conversions is not ... -bit and 16-bit members. 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 - Shallow clone with JGIT

How I can do git clone --depth 1 ... with JGIT library? See Question&Answers more detail:os...

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

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328 views

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java - throws x extends Exception method signature

Reading the JavaDoc of Optional, I bumped in a weird method signature; I never saw in my life: public <X ... t be checked for at runtime? 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 detect if a graphical interface is supported?

I need my Java program to have two display modes: a GUI interface and a command line interface. If I run ... use a command line interface? See Question&Answers more detail:os...

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

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312 views

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java - Google App Engine - Can not find my logging messages

I can not find the results of my logging calls. To log messages I tried both: System.out.println("some ... can be the cause of situation. 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 am I getting this error Premature end of file?

I am trying to parse an XML response, but I am failing miserably. I thought initially that the xml was just ... .MainApp.main(MainApp.java:41) 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 - Android - Shared element transitions with calling activity finish()

I'm working on making an application more Material and I'm just stuck on how to implement some shared element ... I am trying to do? 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 - Mockito asks to add @PrepareForTest for the class even after adding @PrepareForTest

I have the following simple code. I have a class (TestClass) and I want to test "someMethod". There is an external ... .class), any()); } } See Question&Answers more detail:os...

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

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377 views

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java - Getting absolute path of a file loaded via classpath

I have this very specific need wherein a file is loaded from classpath and the same is used in another module ... via classpath can be deduced ? See Question&Answers more detail:os...

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

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436 views

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java - Proper way to handle Android Studio's NullPointerException lint warning

I'm new to android/java programming and am confused how to properly deal with this warning. Method invocation ... 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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282 views

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java - How does Android handle background threads when leaving an Activity?

I need my Android app to save it's state to disk when its activity is put in the background or killed. It' ... killed I'll only lose some edits. See Question&Answers more detail:os...

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

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555 views

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java - VisualVM "not supported for this JVM" on all local applications?

I have already spent a long time to load and test my application, now I need to profile it. But unluckily, ... on the same JVM with VisualVM. See Question&Answers more detail:os...

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

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741 views

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java - Count pairs from an array whose sum is equal to a given number?

I just had an online coding interview and one of the questions asked there is for a given array of integers, ... of the problem ? 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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539 views

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java - count button clicks

I want to count the number of times the button is clicked using GUI. I did this code: private void ... me output of "2". See Question&Answers more detail:os...

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

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284 views

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java - JTextPane highlighting issue

The last days I have been trying to implement a highlighting feature in a small text editor. For some reason I ... the line separators ( ) ? See Question&Answers more detail:os...

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

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537 views

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java - How to make a color gradient in a SeekBar?

I want to use a SeekBar (i.e. old school Java Slider) into a color gradient picker. I have seen some ... replace the background with a gradient. See Question&Answers more detail:os...

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

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287 views

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java - Android - how to make my app default sms app programatically

I am developing an sms blocking app. Which is working fine up to Jelly-Bean. And its not working from ... with example/code-sample. 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 - Access static property or method in JSP via EL 3.0 (JEE7; Tomcat 8)

I'm using tomcat 8.0.9 (servlet 3.1, jsp 2.3, el 3.0) and trying to access a static property from ... , classes, and static fields as needed. See Question&Answers more detail:os...

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

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225 views

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java - hadoop method to send output to multiple directories

My MapReduce job processes data by dates and needs to write output to a certain folder structure ... /part-r-00000 See Question&Answers more detail:os...

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

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262 views

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java - LibGDX 0.9.9 - Apply cubemap in environment

I am using LibGDX 0.9.9. I am trying to render cubemap and fog. So my code snippet below: public void show( ... only. What am I doing 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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