包含标签：Java 的文章
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Java – delete the lowest bit
Given a binary number, what is the fastest way to delete the lowest bit? 01001001010 – > 01001001000 It will be use…… -
Java – type conversion via composition (interfaces and classes)
When I try to use methods that contain generic classes, two of which implement interfaces, I have a major disconnect I…… -
Java – how to create a long value with all bits = 1
I tried the following methods: public static final long DEVICE_ID_UNKNowN = 0xFFFFFFFFFFFFFFFF; But it can lead to The…… -
How to use reduce to sort lists in Java 8?
I have an object list list < BOM > in BOM, I have a list < bomline >, and now I have to use reduce pair Bo…… -
PowerMockito：java. lang.NoClassDefFoundError
I need to simulate a static final class in JUnit test: private MyFinalClient client; @Before public void setup() { …… -
Using generics in Java
I just started using Java, so this may be a stupid question for most people, Set<T> mySet; Eclipse gives an erro…… -
Java – a common JPA repository for multiple entities
I have several entities and use the spring data JPA repository and specifications to query my database Therefore, I cr…… -
Java . Charat (I) comparison problem
Why do you have to get a char from a string when comparing a char with another char? For example; It doesn't work whil…… -
JavaFX: draw sharp thin lines
I want to know how to use JavaFX to draw sharp thin lines I think my line is black, 1 pixel high This is what I have n…… -
Use lambda to provide stack based context (for example, the path of a file operation)
I have a subtle way (which may have been implemented and discussed) to do the same in groovy (from groovy documentatio…… -
Implementation of redblacktree insertion in Java
I am trying to implement the CLRs pseudo code of red black tree NullPointerException is thrown when I try to run the p…… -
Java – bounded wildcard of static factory pattern of return type
I read in effective Java that you shouldn't use bounded wildcards as return types, but I don't know what I should do T…… -
Java: find out what uses all memory
I have an out of memory Java application, but I don't know which code is allocating memory Is there an app I can view?…… -
Java – Jenkins – configure JDK – text box only, and automatic installation fails
I'm trying to create a Jenkins - based build server for our Android application The build failed because it cannot aut…… -
Java – querydsl query parameters?
Using JPA, we have the namedquery witch. Let's pass the parameters in this way: public <T2> T2 getSingleResult(S…… -
Java – what is the motivation for attributes?
I'm a little confused about why language has these I'm a java programmer at the beginning of my career, so Java is the…… -
Java – does spring data JPA need eclipse links and Hibernate?
I've changed spring data from 1.7 1 upgrade to 1.9 0 and get dependencies and compilation errors immediately: For vari…… -
Java – how to allow users to drag and drop releases in vaadin tables?
I have a multi - row table with custom components I want to allow users to delay the release I tried the following cod…… -
Multithreading – multiple UI threads on the same window
I don't want multiple windows. Each window has its own UI thread. I don't need to raise events on a single UI thread i…… -
Java – static variables, patterns and Android performance
I am doing some major refactoring operations. Compared with some performance improvements in Android applications, it …… -
Youtube API search response (Java)
Using Java's Youtube API, I did a video search Load size: / / developers google. com/youtube/v3/code_ samples/java#sea…… -
How do I get the fifth root in Java?
I'm trying to get the fifth root of the number for my program I used math pow(a,b); The way to get this, but for some …… -
Java – how to use MDC to dynamically create log file names in log4j 2
I'm trying to generate different log files based on the values passed through MDC in log4j After trying several method…… -
Java – any possibility of using jpaupdateclause for batch updates in querydsl?
Is it possible to use jpaupdateclause for batch update in querydsl? In exploring the jpuspdateclause class, I only fou…… -
Java – hibernate and criteria APIs return an object array instead of tuple
I'm trying the criteria API and I'm facing strange problems with tuples I am building a query similar to that describe…… -
Multithreading – consumer – producer: pauses the consumer if memory usage exceeds a certain threshold
I have a situation where my main thread (producer) allocates a large amount of memory for a task on the heap, some wor…… -
The test with transactionrequiredexception failed: when loading JPA and neo4j configurations, no transaction is in progress
I have a JPA web application that contains some integration tests for the JPA repository At present, there is no integ…… -
Java: parses string array items into, int, double, or string
import java.io.File; import java.io.File; import java.io.FileNotFoundException; import java.util.Arrays; import java.u…… -
Get all users and roles in Java webapp
Question: >Is there a general role for user and concept servlet containers? > If so, is there a container indepe…… -
Java – you want to use transactions in Hibernate queries to delete existing documents from folders and database values in tables
I have a file upload application After uploading the file, create a new document path and save the document in the fil…… -
Java code creates HTML files and dynamically adds lines
I want to create a log in Java HTML file, where I will dump the error to the HTML table row when the error is captured…… -
Java – buildfinished and buildstarted will not work properly
I'm from org apache. tools. ant. Defaultlogger of defaultlogger creates a subclass: public class ExtendedLogger extend……