包含标签：Java 的文章
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Java – JIT – micro optimization – if statement elimination
We assume that we have the following code: public static void check() { if (Config.initialized) { ..…… -
Java – hibernate is much faster when executing native queries
The following query should return about 800 objects The problem is that hibernate actually executes 800 queries to get…… -
Why use Java. Net in Java security. Can securitymanager read any file?
I just want to read and write some files in my java program So I use Java security. Security manager to manage it, but…… -
Java – why does JIT compile some methods at startup?
I am studying JIT behavior on a very simple code block: public class PlayWithAssembly { public static void main(S…… -
The method filter (predict ) in Java – stream type is not applicable to parameters ((E) – > {})
How to set the value in Java 8 in the filter? I want to set emailid to null, where firstname is Raj How can I do this …… -
Java – call executorservice. Java from completable future shutdownNow
When one of the already running tasks throws an exception, I need to cancel all the scheduled but not yet running comp…… -
Java – error calling method check when deploying war on Tomcat
When I deploy the war generated by ant on the local system (copy / paste under / webapps), everything is normal The pr…… -
Java – add fields to webservice
I have a soap service that exposes methods TradeDetail getTradeDetail() Tradedetail stores five fields, transaction nu…… -
Java – the following code is thread safe
I have a scenario. I must maintain a map that can be filled by multiple threads. Each thread modifies the correspondin…… -
How will you implement a secure static login credential system in Java?
We recently conducted a security audit and exposed some weaknesses in the system here One of the resulting tasks is th…… -
Java – condition check C: if always fails
c: If the test always fails to me, it will never enter the loop I use the following namespace xmlns:fn="http://java.su…… -
Java – when to use global transactions or spring AOP for transactions
Q1. I know that when we need to deal with multiple databases, we need to use global transactions But from this article…… -
Ugly Java data structure
I created the following structure that maps unique double values to one or more pairs of integers: @SuppressWarnings("…… -
Java – equivalent to JFrame What is the AWT of setdefaultcloseoperation?
We use the setdefaultcloseoperation (JFrame. Exit_on_close) method of JFrame I want to support the native look and fee…… -
Java – how to sort a two-dimensional array in dictionary order?
Suppose we have a two-dimensional array as follows: int[][] source = { { 3,5,6,1},{ 3,3,-6},{ -1,-3,-5,{ 124,43…… -
Java – how to sort conditions using the flow API
I study stream API. I have this task I need to sort the list set according to their length order, and if several rows …… -
Java – Eclipse Plug-in – notification when opening the editor in eclipse
I want to be notified when I open the editor in eclipse What is the best way? Solution From this thread (Note: startin…… -
Java：SelectionKey. Is attach () broken?
In my java NiO implementation, I cannot make selectionkey Attach () works Basically, once the clients connect (op_acce…… -
Java – why does the JUnit test method need to be void?
I have read many places that the test method should / must be invalid, but no one says why I found no comments / JavaD…… -
How to use resourcebundle to avoid hard coding configuration paths in Java applications?
I want to eliminate the dependency of hard coded path of configuration data in my java application. I know that using …… -
How do I resolve errors about incompatible types?
I study java projects on IntelliJ Then I found an error about incompatible types in the try catch block This is part o…… -
Can the skip method of Java – stream make the infinite stream limited?
"The limit() and skip() methods make the stream smaller. They can make the finite flow smaller, or they can generate a…… -
Java – do calls to thread safe functions also need to be synchronized?
If I am using concurrenthashmap (where put is thread safe) and I provide a common function myput using concurrenthashm…… -
Multithreading – * * * glibc detected * * * double free or corrupt (fasttop):
The clear call to qbytearray generates the following exception: *Glibc * / home / Yan / fps2 / fps2 detected: double f…… -
Java – is the public modifier in the private class of the package redundant?
Suppose I'm in package com Test in test Java declares a class test: I want to know, isn't the public access modifier o…… -
Java – installing IBM JRE on windows (non IBM machines)
I am developing a Java 5.0 application that connects to the default message queue of websphere application server My a…… -
Java – how to use “jconsole” with WebSphere 6.1?
I have deployed some managed beans on WebSphere 6.1 and I have tried to call them through a stand-alone client, but wh…… -
Java – use streams to map to 2D arrays
I'm trying to create a 2D string array using streams: String[] fruit1DArray; String[][] fruit2DArray; Map<String,S…… -
Java – how to collect logs in JBoss related to a single request?
I am developing a Java EE web application running under JBoss I want to do the following: when a user sends an HTTP re…… -
Java – how do I use a project in another project as a module?
I want to modularize the Android project so that it is easy to maintain in the future I wonder if it is possible to us…… -
I can use Java util. Set implements state transition for DFA in Java
I am working as close as possible to formally define the implementation of DFA as a learning exercise (and blog materi…… -
Can the Java / Scala / etc code tell Tomcat when to run it?
I have my webapp data in a database that can be accessed in different ways from different places There is no common co……