Recent questions tagged java

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java - Why is possible to write a function outside a class in Kotlin?

I don't understand why is possible to write a function outside a class in Kotlin ? Is that a good practice ? For ... to use one or the other. 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 - Web app version in Tomcat Manager

How can I configure my web application for deployment in Tomcat so that Tomcat Manager shows the version in the table ... using Tomcat 7.0.11. 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 align all elements to the left in JPanel?

I would like to have all elements in my JPanel to be aligned to the left. I try to do it in the following ... (not left part) of the JPanel. 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 - Cannot refer to the static enum field within an initializer?

I just got Java5 project that has this error, i tried using Java5 and Java6, but its still there. it ... can i bypass that compiler 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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java - Why private method can not be final as well?

Is it redundant to add private and final to a same method? class SomeClass { //--snip-- private final void ... (or am I missing something?) 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 a threadpool be reused after shutdown

I have a .csv file containing over 70 million lines of which each line is to generate a Runnable and then executed ... ; return true; } 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 - Align text in JLabel to the right

I have a JPanel with some JLabel added with the add() method of JPanel. I want to align the JLabel to the ... to do that. Any Idea? 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 - How to remove an element of a HashMap whilst streaming (lambda)

I have the following situation where I need to remove an element from a stream. map.entrySet().stream(). ... deal with this situation 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 - Check if a String is in an ArrayList of Strings

How can I check if a String is there in the List? I want to assign 1 to temp if there is a result, 2 ... if(no.equals(bankAccNo)) temp = 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 - Where did jvisualvm go?

I am running Mac OSX Snow Leopard. I've always updated Java using the regular Software Update features of Mac OSX. ... .0.jdk/Contents/Home WTF? 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 could I split a String into an array in Kotlin?

I need to split a String read in from a file into an array of values. I want to split the String at the commas ... How I could do it in Kotlin? 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 - Unable to install java8 with homebrew

Installing java8 with Homebrew seems to no longer be working. After running: brew install caskroom/cask/java8 I ... java8 on MacOS nowadays? 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 -- inject 2 beans of same type

I like constructor-based injection as it allows me to make injected fields final. I also like annotation driven ... that does not exist yet? 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 is the purpose of doOnNext(...) in RxJava

When should we use doOnNext() from Observable instead of just onNext()? 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 sort arraylist by properties

I want to sort an ArrayList by a property. This is my code... public class FishDB{ public static Object Fish; ... that. Does anybody know how? See Question&Answers more detail:os...

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

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265 views

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java - Unknown version of Tomcat was specified in Eclipse

I want to add latest tomcat-7.0.42 in my eclipse. Probably eclipse tomcat server adapter 7 only supports tomcat ... eclipse with tomcat-7.0.42 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 - Is there a method reference for a no-op (NOP) that can be used for anything lambda?

This may sounds like a strange question, but is there a way to refer to a standard no-op (aka null ... deficiency in the lambdas 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 - IntelliJ: Generate switch case

Is there really no way to generate a switch case for a given variable in IntelliJ? Ctrl+Space as well as Ctrl+J yield no results. See Question&Answers more detail:os...

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

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226 views

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java - Increment a Integer's int value?

How do I increment a Integer's value in Java? I know I can get the value with intValue, and I can set it ... Integer playerID = new Integer(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 - Determine if array contains two elements which equal a certain sum?

// Checks whether the array contains two elements whose sum is s. // Input: A list of numbers and an integer s // ... ; } } } } return 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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260 views

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java - Automatic login to JSF application on revisits, after once logged in

For typical most typical internet facing websites when you login & leave the website by just closing the tab (without ... 2.1 on Tomcat7 server 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 - Parsing XML into JSON

I have an XML file, like <stock><name>AXL</name><time>19-07</time><price>11.34</price></stock> < ... I parse this into JSON structure 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 - Overriding method with generic return type

Let's say I have a super-class that defines the following abstract method public abstract <T extends Interface> ... get rid of the warning? See Question&Answers more detail:os...

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

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235 views

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java - Problems with prime numbers

I am trying to write a program to find the largest prime factor of a very large number, and have tried several methods ... about 2^40, or 10^11. 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 - WS Client with Proxy and Autentification

I know this isn't exactly the correct way to ask a question, but I'm having a problem: I have a ... authentification I'dd really appreciate 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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124 views

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java - Create an incrementing timer in seconds in 00:00 format?

I want to create an incrementing second timer like a stopwatch. So I want to be able to display the seconds and ... at 0, can anyone see 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 - Hibernate Validator, custom ResourceBundleLocator and Spring

I'm trying to override default ResourceBundleLocator in hibernate validation 4.1. So far it works perfectly, ... or applicationContext.xml 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 - A better way to run code for a period of time

I need to run some code for a predefined length of time, when the time is up it needs to stop. Currently I ... (newCoOrds); } } ,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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