包含标签：Java 的文章
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Java – sun. Not found security. ssl. SSLSessionImpl
When I try to use okhttp or javax ws. rs.client. Client, the following error occurs In sun security. Search in SSL pac…… -
Java – many Boolean flags are entered into the class
I have a dialog box that displays various contents according to the status of the application and the security of the …… -
How can I disable a node without graying it out in JavaFX?
My problem is that I can disable nodes so that users cannot interact with them when printing However, for the same rea…… -
Java – add string value
Here is the Java problem: Solution String str = "abcde"; String str = "abcde"; System.out.println(getIncrementedString…… -
Java – system. Java on Windows Where’s err?
I have a Java GUI based application that writes some diagnostic messages to system Out and system err. Where are these…… -
Java – lock files when writing files to disk
I have two separate threads F1 and F2 (specifically, two Java. Util. Concurrent. Futuretask instances) running in para…… -
How do I use instance variables twice without renaming them?
Help, I've just started learning Java. This online tutorial I'm doing requires me to create an instance of a class The…… -
Java – random number generator
I need to write a program in Java to generate random numbers within the range of [0,1] using the following formula: Su…… -
Java – peek() actually sees the element flow through a point in the pipeline
My question is expressed in the simplest way: According to Javadoc: I have a 10 meter pipe, 3 to 7 meters away from th…… -
java – org. elasticsearch. client. transport. Nonodeavailableexception: no configured node is available: []
I run elasticsearch on docker, which is available locally $curl http://192.168.99.100:9200/?pretty { "status" : 200,…… -
Recent Java references?
I've been programming java, but I've been away from it for some time Anyone can recommend a very good java reference, …… -
Java: copying properties from one object instance to another
Say you have public class Car{ private Engine m_eng; public Car(){ } public Engine getEngine(){ return m…… -
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……