Recent questions tagged java

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java - What is the difference between double a = a + int b and int a += double b?

Why does: public class Addition { public static void main() { int a = 0; double b = 1.0; a = a + b; ... ; System.out.println(a); } } compiles. 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 the difference between Eclipse 3.7, 3.8 and 4.2?

Eclipse Indigo is 3.7, and Eclipse Juno is 4.2, but 3.8M1 has just been released. What's 3.8 and how is this ... use 3.8M1 or wait for 3.7.1 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 - How can I get the package name of the current launcher in android 2.3 and above?

How can I get the package name of the current launcher in android 2.3 and above programmatically in 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 - Why does select() consume so much CPU time in my program?

I have several Java applications that use MINA, and all of them use 20 MINA threads. One application serves ... this relevant bug is fixed. 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 - Importing SSL Certificate into Eclipse

How do you import an SSL certificate created by java into a project in Eclipse? 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 - Where to put static files for Spark Web Framework?

Where do I put files when trying to serve static files with the Spark web framework? I haven't been able to ... my depth trying to find 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 - UnsatisfiedLinkError: /tmp/snappy-1.1.4-libsnappyjava.so Error loading shared library ld-linux-x86-64.so.2: No such file or directory

I am trying to run a Kafka Streams application in kubernetes. When I launch the pod I get the following ... java: JLI_Launch: symbol not found 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 include test classes in Jar created by maven-shade-plugin?

I'm trying to package my test classes in to an executable jar with dependencies using Maven, but I' ... ://github.com/C0deAttack/ExecutableTests 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 - Determine the number of pages in a PDF file

How can I determine the number of pages in a given PDF file, using a free/open source Java API? 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 - Speed up application start by adding own application classes to classes.jsa

To speed up the startup time of the JVM, the Sun developers decided it is a good idea to precompile the ... for me to investigaete further. 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 a list of accessible methods for a given class via reflection

Is there a way to get a list of methods that would be accessible (not necessarily public) by a ... missing something glaringly obvious 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 - Is using Spring AOP for logging a good idea?

I'm reading up on Spring at the moment and one of the examples used for a use of AOP is logging the start ... Am I barking up the wrong tree? See Question&Answers more detail:os...

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

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101 views

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java - Remove duplicates from List using Guava

How can we remove duplicates from List with the help of Guava api? Currently I am following this: private List<T ... LinkedHashSet<T>(list)); } See Question&Answers more detail:os...

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

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252 views

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java - ActionBarActivity: cannot be resolved to a type

I am new to android-programming. I am following this tutorial to add an ActionBar to my Main_Activity using the ... what did I do 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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107 views

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java - Is Thread.interrupt() evil?

A teammate made the following claim: "Thread.interrupt() is inherently broken, and should (almost) never be used". ... is - is it buggy? See Question&Answers more detail:os...

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

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220 views

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java - Reading from src/main/resources gives NullPointerException

In my Maven project, I have a xls file in src/main/resources. When I read it like this: InputStream in = ... . 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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142 views

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java - Check date with todays date

I have written some code to check two dates, a start date and an end date. If the end date is before the start ... Before Start Date" + " "; } See Question&Answers more detail:os...

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

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127 views

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java - How to use Flyway when working with feature branches

We have recently moved to using feature branches for each story we work on. These are as independent as ... and master before the release. See Question&Answers more detail:os...

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

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156 views

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java - Enums - static and instance blocks

I had learned that in Java the static block gets executed when the class is initialized and instance block ... instance block 20 static block See Question&Answers more detail:os...

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

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308 views

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java - How to convert from Json to Protobuf?

I'm new to using protobuf, and was wondering if there is a simple way to convert a json stream/string to a ... Thanks in advance for the 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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211 views

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java - Should I always wrap an InputStream as BufferedInputStream?

Does it make sense to always wrap an InputStream as BufferedInputStream, when I know whether the given InputStream is ... (is); return 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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546 views

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java - Why do I get an Enum constant reference cannot be qualified in a case label?

Why does the following code fail to compile, while changing the case statement to case ENUM1: doSomeStuff(); works? ... doSomeStuff(); } } } See Question&Answers more detail:os...

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

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233 views

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java - How Spring Boot run batch jobs

I followed this sample for Spring Batch with Boot. When you run the main method the job is executed. ... prevent the automatic job execution? See Question&Answers more detail:os...

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

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186 views

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java - Retrofit Post Parameter

I am implementing login feature and for that using Post request but i am getting error saying "retrofit. ... http.HttpMethod.METHODS 02-10 See Question&Answers more detail:os...

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

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321 views

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java - jsoup - strip all formatting and link tags, keep text only

Let's say i have a html fragment like this: <p> <span> foo </span> <em> bar <a> foobar </a> ... decoded human readable form, width line breaks. See Question&Answers more detail:os...

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

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513 views

1 answer

java - How to apply bold text style for an entire row using Apache POI?

How to make an entire excel row cells bold text using Apache POI? E.g: Column headings should be in bold. ... some style to an entire row? See Question&Answers more detail:os...

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

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175 views

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java - Spring @Async Not Working

An @Async method in a @Service-annotated class is not being called asynchronously - it's blocking the thread. ... config elements going on? See Question&Answers more detail:os...

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

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126 views

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java - Confusing output from String.split

I do not understand the output of this code: public class StringDemo{ public static void main(String args[]) { ... : Output1: 1 Output2: 0 See Question&Answers more detail:os...

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

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