包含标签：Java 的文章
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The easiest way to extract jars in Java
Basically, I have a jar file that I want to unzip from JUnit test to a specific folder What is the easiest way? If nec…… -
What is the difference between byte [] and list in Java?
Both can be used to create byte lists But what's the difference between them? byte[] buffer; List<Byte> buffer; …… -
How do I send commands to a running Java program?
I have a java program that I want to send commands from my Win32 Application Usually I use WM_ COPYDATA, but what opti…… -
Java mongodb 3.0 driver query without filter
How do I query using the Java mongodb 3.0 driver? I tried to query unique category records from the location collectio…… -
java – Collectors. Set implementation in toset()?
See English answers > what is default set / list implementation with collectors in Java 8 stream API? 1 Stream.of(1…… -
Java – use durationformatutils to format periods in a good way
This is very effective: out.println(DurationFormatUtils.formatPeriod( new Date().getTime(),mat…… -
Exception in Java platform library
Sometimes I check the Java platform library for inspiration There are many good design solutions, such as this questio…… -
Converting arrays in Java
Suppose we have an array of integers, such as int [] x = {0,1,2,3}; Can I convert x to an array of string type? Can I …… -
Java 8 list copy
See English answers > how to clone ArrayList and also clone its contents? 17 I can't update the employee object pub…… -
Find a method in the Java logging framework scenario
Java has many frameworks / APIs to help you log in to your application: >The Java API has java util. Logging packag…… -
Java – hibernate comment, specifying column defaults
I have a domain object with the following comments @Entity @Table(name = "REQUEST") public class Request { /** …… -
Java – is there a delayed loading implementation of JList?
Is there any way to implement delayed loading with swing's JList? Solution In a way, yes You can create a custom listm…… -
Java – why does the stream operation repeat with the collector?
Allow me to make some complaints, which may be interesting, but I want to describe: "why did you raise this question?"…… -
Java – how do I close the JFrame by clicking the button?
I want to have a button in my window. If I click it, the window will close I found that I can close windows in the fol…… -
Java – retrieves the bits of a number
An attempt is made to retrieve bits of some numbers, such as the flag bit 00001011 of byte 11 below, (byte) 11 >>…… -
Java / Swing: low key button height?
I want to reduce the vertical size of JButton The following code applies to k > 1, but I can't seem to reduce the s…… -
Java thread is in doubt
I previously published a query about Java threads ( link text) Based on the answers I received, I decided to implement…… -
Java – what are the uses of objects of type object
I saw the code below the exercise in the scjp book Object obj = new Object(); First of all, I think this may be a mist…… -
Collision detection between two rectangles in Java
I have two rectangles, a red rectangle (movable) and a blue rectangle When a collision occurs between blue and red rec…… -
Reduce map using java 8 stream API
I have a map of the following table: Map<Integer,Map<String,Double>> START Make inner an internal map, i.e…… -
java – JDK 1.4. 2 “contains (charsequences)” method in string class
In Java 1.5, the contains (charsequences) method was added to the string class This method How would you do this in Ja…… -
java – Jersey：com. sun. jersey. spi. inject. Errors $ErrorMessagesException
I'm having trouble using the Jersey (1.8), Maven and hibernate I received this error (full log) INFO: Scanning for roo…… -
Java NullPointerException for null condition check
I have a very basic method as part of the binary search tree. If the current binary node has a correct child node, it …… -
Base-n series generator for a given number in Java,
I want to create a program to generate a given base-n series, Is there any general mechanism to find these numbers so …… -
Which simulates the optional parameters in Java better?
I have a Java method with three parameters, and I hope it also has the fourth "optional" parameter I know that Java do…… -
Java program for factorial incorrect output
I execute the following java code in the eclipse ide public class Programs { public static void main(String[] arg…… -
Java – make jlabel disappear
I am writing an application to perform a task and notify the user when the task is successfully completed Inform the u…… -
Java – order and difference between HashSet and JDK 7 / 8
This is a two-part question: >Whether HashSet implements some hidden sorting mechanisms, or just references documen…… -
Java string format
I have a property file containing strings in the following format: audit.log.events.purged=The audit events were purge…… -
How do I force two Java threads to run on the same processor / core?
I want a solution that does not include critical parts or similar synchronization alternatives I'm looking for somethi…… -
Java 8 – restrict the flow of the first object and convert it to a specific object?
I used earlier: List<Person> person = UserDB.getUserDetails(); Person p = person.get(0); // index of first posit…… -
Java – how to use regular expressions to check whether HTML documents contain non empty script tags
I try to check whether an HTML document contains script tags that are not empty using regular expressions Regular expr……