Java 归档 - Page 331 of 655

Multithreading – how do I do the same calculations faster on a 4-core CPU: 4 threads or 50 threads?

Let's assume that we have a fixed amount of computing work, no blocking, sleep, I / O waiting This work can be well pa……

Java

2020-02-03

Java – ant contains external jar

I want to include an external jar. Jar in my java project I'm using ants External Jar is located in the Lib folder My ……

Java

2020-02-03

Java – timed out after 30000 milliseconds while waiting for a server that matches the writableserverselector

I have seen this problem in many forums, but none of them can solve my problem I'm trying to insert the sample documen……

Java

2020-02-03

Converting an image to a cylinder in Java

I didn't find any examples in OpenCV to convert a flat image into a cylinder in Java. I wanted it to render the image ……

Java

2020-02-03

Effective method for creating string from char [], start, length

We are using java Sax to parse very large XML files Our roles are as follows: @Override public void characters(char ch……

Java

2020-02-03

Java – prevents the use of non thread safe methods in a multithreaded context

Is there any way to throw an exception when a user tries to use a class's non thread safe method in a multithreaded co……

Java

2020-02-03

Java – SWT problem using syncexec()

This is my first question on stackoverflow I'll try my best to explain the problem I have a SWT application with foreg……

Java

2020-02-03

Java – Hibernate: automatically split tables every month

I'm working on a spring MVC application with PostgreSQL and hibernate. I have several tables with more than 100000 row……

Java

2020-02-03

Java – why are some methods on jconsole disabled

I can see that some methods on jconsole are disabled The following shows com sun. management. Screenshot of threadmxbe……

Java

2020-02-03

Java – realm: create a relationship by ID

Suppose I have several domain objects (tables) with many connections between them, and I haven't pre filled all the ob……

Java

2020-02-03

Java – how to get intersections from shapes in elasticsearch

I have stored the path in elasticsearch as polygon Now that I have a circle (a point and a radius), I can check whethe……

Java

2020-02-03

Java – how to select the correct list implementation?

From this codereview answer, I also tend to use fairly large ArrayLists, and I don't see the logic to choose other lis……

Java

2020-02-03

Multithreading – Perl threads: how to make a producer?

I have a feature that runs very slowly I need to enter this function in the main part of the program So I want to do s……

Java

2020-02-03

Java – hibernate does not get the null value of the field in the database record

I use the following hibernate code to get data from the database SessionFactory factory = null; Session session = ……

Java

2020-02-03

Java – MapReduce job in headless environment failed n times due to am container exception started by the container

When running a map reduction job in a headless environment in Mac OS X (for example, when running a job as a specific ……

Java

2020-02-03

Java – can log4j restore integrity from disk?

We run several Java application servers and several applications here They all use log4j to log into the same file sys……

Java

2020-02-03

Java – conditional insertion using spring JPA / Hibernate

I am developing a project running in a cluster environment with many nodes and a database The project uses spring data……

Java

2020-02-03

Compile my project using java 7, but run my tests in gradle using java 8

I'm currently deploying my war to a WebLogic Server that supports Java 7, but I want to use Java 8.0 in my selenium an……

Java

2020-02-03

Java – prefix existing fields with M

I'm trying to make a structural replacement for my project I have a package of 100 classes, each containing 1 - 20 fie……

Java

2020-02-03

Java – a 0-byte file appears when capturing a screen through screensap

I had trouble capturing the screen of a non - rooted phone I tried this command on my computer: adb shell /system/bin/……

Java

2020-02-03

Java – generics using arrayadapters

I encountered a problem trying to create a generic arrayadapter This may be related to my limited understanding of gen……

Java

2020-02-03

Java – vector vs synchronizedlist performance

When reading the Oracle tutorial on collection implementation, I found the following sentences: Source: List implement……

Java

2020-02-03

Java – rxtx cannot list or find ports under Windows 7 64 bit

good morning, I'm having trouble using and / or installing rxtx on Windows 7 64 bit I used to have no problem using it……

Java

2020-02-03

Data type of Java arithmetic calculation result

In Java, I know that the data type of arithmetic calculation results depends on the data type of numbers involved in t……

Java

2020-02-03

Java math package for inverse cumulative distribution of skew normals and Poisson and exponent

I am looking for a package that provides mathematical functions for asymmetric (skewed) normal distribution and Poisso……

Java

2020-02-03

Java – how to use jet’s let encryption certificate?

I want to use let's encrypt certificates and a large number of jetty servers One problem is that the certificate from ……

Java

2020-02-03

Java – unable to connect to spring 4 websocket using sockjs stomp over socket

Try using sockjs to use spring 4 websocket with stomp on the socket My configuration: websocket. XML – part of the spr……

Java

2020-02-03

Google pub / sub test strategy for local gae Java dev server

My team and I really want to include Google pub / sub in our application because it will solve some coupling problems ……

Java

2020-02-03

Java – how to rerun failed tests in Espresso? – Brainstorm

I want to find out how to rerun failed tests using espresso I think from the common JUnit test cases, this is a little……

Java

2020-02-03

Java – Blank Icon in Windows 10 notifications

My java application displays its icons on the system tray using code that looks more or less like: Toolkit mainToolkit……

Java

2020-02-03

Ejb-3.0 – set this transactionattributetype NOT_ What can supported get

I happened to find an example of using this structure, although I don't know what I can get from it? Does this mean th……

Java

2020-02-03

Java EE – what Maven dependencies can I use to create a separate JMS client for GlassFish?

I want to create a very simple JMS standalone client for JMS topics hosted on my GlassFish server My project was built……

Java

2020-02-03

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Multithreading – how do I do the same calculations faster on a 4-core CPU: 4 threads or 50 threads?

Java – ant contains external jar

Java – timed out after 30000 milliseconds while waiting for a server that matches the writableserverselector

Converting an image to a cylinder in Java

Effective method for creating string from char [], start, length

Java – prevents the use of non thread safe methods in a multithreaded context

Java – SWT problem using syncexec()

Java – Hibernate: automatically split tables every month

Java – why are some methods on jconsole disabled

Java – realm: create a relationship by ID

Java – how to get intersections from shapes in elasticsearch

Java – how to select the correct list implementation?

Multithreading – Perl threads: how to make a producer?

Java – hibernate does not get the null value of the field in the database record

Java – MapReduce job in headless environment failed n times due to am container exception started by the container

Java – can log4j restore integrity from disk?

Java – conditional insertion using spring JPA / Hibernate

Compile my project using java 7, but run my tests in gradle using java 8

Java – prefix existing fields with M

Java – a 0-byte file appears when capturing a screen through screensap

Java – generics using arrayadapters

Java – vector vs synchronizedlist performance

Java – rxtx cannot list or find ports under Windows 7 64 bit

Data type of Java arithmetic calculation result

Java math package for inverse cumulative distribution of skew normals and Poisson and exponent

Java – how to use jet’s let encryption certificate?

Java – unable to connect to spring 4 websocket using sockjs stomp over socket

Google pub / sub test strategy for local gae Java dev server

Java – how to rerun failed tests in Espresso? – Brainstorm

Java – Blank Icon in Windows 10 notifications

Ejb-3.0 – set this transactionattributetype NOT_ What can supported get

Java EE – what Maven dependencies can I use to create a separate JMS client for GlassFish?

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