Java
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Java 8 lambda specifies the map type and makes it immutable
I have the following code, generated using Lambdas for several months Map<Integer,String> tempMap = new LinkedHa…… -
Java 8 stream – merge two sets to make them unique in a specific field [copy]
See English answers > java 8 distinct by property 20 This is the best I can do in Java, but it collects unique name…… -
Java – how do I wait for the alert box to perform an action in selenium?
I press the Cancel button than check some text according to my code In chrome and Firefox, it works normally, but in i…… -
Java – should hibernate use a unique sequence for each table?
I have several entities using automatic key generation strategies with hibernate and Postgres @Id @GeneratedValue(stra…… -
Pass checkstyle to Java Hello World
So I'm a novice using checkstyle. For my simple HelloWorld Java program, I received a lot of errors that I don't under…… -
Convert an existing c# synchronous method to asynchronous using async / await?
Starting with the synchronous I / O binding method (shown below), how do I use async / await to make it asynchronous? …… -
java – android. support. v7. app. ActionBarImplICS. Getthemedcontext NullPointerException in Android
Please help me get Java lang.NullPointerException java.lang.NullPointerException at android.support.v7.app.ActionBarIm…… -
Java – eclipse / ant creates a jar in version 1.9, even if everything seems to be set to 1.8
I have a project built using ant and eclipse, and I want it to be compatible with Java 8 When I try to run jar using j…… -
Java – where does Maven search for log4j Properties file?
I am using log4j with Maven to face problems I have a properties file, log4j Properties, I put this file in the POM. N…… -
Java 8: default method for automatically synthesizing multiple interfaces
I have classes that implement multiple interfaces with the same default methods I want to know how to synthesize defau…… -
Java – spring: you cannot connect to JMX server from behind the firewall using RMI
My spring application runs on the machine behind the NAT firewall (pfsense) The internal IP of the machine is a.b.c.d …… -
Java – @ datetimeformat not recognized
I tried to annotate a localdatetime object with @ datetimeformat My main idea is that once a string is received in the…… -
Match two very large vectors with tolerance (fast! But workspace reserved)
Consider that I have two vectors One is the reference vector / list, which includes all values of interest and a sampl…… -
How to declare a class containing generic type fields in kotlin?
I have a data class in kotlin data class APIResponse<out T>(val status: String,val code: Int,val message: String…… -
Go – concurrent file system scanning
I want to get the file information of the files in the directory (file name and size, in bytes) But there are many sub…… -
How to use libgdx to obtain mobile phone language?
I am setting the default language of my game. I hope it is the language of my mobile phone. The question is: how can I…… -
Java – how to create a listview with multiple views
My question is – how to create a custom list view instead of just repeating a custom view, but like in instagram or ot…… -
Neo4j – Java heap space Wrong query or setting?
I have neo4j a problem introduce I have to build an application that stores bus / train routes This is my architecture…… -
Java – specifies the specific enumeration passed to the method in the mockito doreturn method
I have a JUnit test. I have an object simulated in a class Let's call the mocker class with @ mock of mymanager named …… -
Java – how do I update the sample to use the latest versions of Jetty (9.1.0. RC2) and Jersey (2.7)?
I've been trying to follow this example, but I'm not lucky At the suggestion of the following reviewers, I decided to …… -
Java – spring boot gradle – where to place the environment configuration?
I am using a simple application in spring boot It is developed locally (and effective): >Gradle, > H2 database, …… -
Java – split image into parts
I know there are many topics about this, but none really suits me The image should be saveable I tried bufferedimage, …… -
Java – libgdx – the best way to adjust the flame rate in the cycle
I'm making 2D platform games / shooting games with libgdx I'm doing this cycle. Pressing and holding the fire button w…… -
Java – create multiple jlabels and jtextfields in a less redundant way?
Anyone familiar with the Java GUI – swing package... And knows how to create multiple swing objects in a loop, such as…… -
Avoid NoSuchElementException in Java 8 streams
This problem is a follow-up to the earlier problem: adding up bigdecisions using streams The problem is related to add…… -
Java moves left and fills zeros
I want to move left, but fill in zero, just like int number = 20 >>> 10 = ( 0000 0000 0000 0000 0000 0000 000…… -
Java – unable to parse the import org. Org springframework. test. context. junit4. SpringRunner
I'm trying to solve this problem from now on But I still haven't solved it I just got out of spring IO downloads a spr…… -
Unit test – unit test vertx – Java util. concurrent. TimeoutException
I'm trying to test HTTP calls from the vertx webclient unit using the rxified version of vertxunitrunner and vertx The…… -
Java – the difference between string, string builders, character arrays and ArrayList
Strings are immutable String builders are not, so you can add characters at the end String is a character array. If I'…… -
Java – adds multiple bigdecimals to a map
I tried to aggregate multiple bigdecimals from the list At present, I am using two streams, but if possible, I want on…… -
Java – insert spaces after commas, periods, and other punctuation marks
In Java, the best way to fix missing spaces after some punctuation is: ,. ; : ? ! For example: String example = "This …… -
Java – after successful matching, continue to match the scala switch of the next case
How to execute another case block after executing one case block in a Scala switch statement (in Java: no interruption……