包含标签：Java 的文章
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Simple chat room based on Pushlet and bootstrap in Java
This is a simple chat room. This code contains the following functions 1. User registration. 2. User login. 3. Of cour…… -
Analysis of the conversion between list and array in Java
This paper analyzes the method of converting list and array in Java. Share with you for your reference. The details ar…… -
Java tool class for connecting to MySQL database
A encapsulated tool class that links to the MySQL database can easily obtain the connection object and close the state…… -
How to use SNMP and Java?
I'm writing an application to access network printers As part of this application, I need to know the "status" of the …… -
java – Guice inject. GetInstance () – good practice?
Suppose I have two applications that share the same library The library contains common classes, such as Dao, utils, e…… -
java – Criteria. DISTINCT_ ROOT_ Entity does not block duplicate objects
I have the following Dharma: @Override public List<AdminRole> findAll() { Session session = sessionFactory.g…… -
Java – query object pattern
I need to implement a query object pattern in Java for my customizable search interface (webapp being written) Does an…… -
Set the default application icon image in Java swing on OS X
I'm setting up an icon image for a jar file: setIconImage(new ImageIcon(getClass().getResource("logo.png")).getImage()…… -
The windows process executed by the java process did not terminate
I create a process on windows from Java My problem is that this process will not end This is an example program: impor…… -
Java – is it bad practice to capture numberformatexception?
I have to parse a string that can take hexadecimal or other non hexadecimal values 0xff, 0x31 or a, PC, label, etc I u…… -
Java – JDBC transaction and connection clarification
I'm using JDBC to talk to my Postgres database If my entire application runs a single connection, that is, there is on…… -
@ preauthorize at the type level of Java – spring security cannot be overridden at the method level
I try to protect the controller with a type level @ preauthorize annotation and try to override this behavior by using…… -
Java print string variable
When I run (seemingly simple) code, I get some strange output This is what I have: import java.util.Scanner; public c…… -
Java – Tomcat spring and environment variables
In the spring file, I have: <bean id="propertyConfigurer" class="org.myapp.MyConfigurator"> <property…… -
Java – how to make the variable method take a single array as the first value of the varargs array?
Given the variable: Object[] ab = new Object[] { "a","b" }; Object[] cd = new Object[] { "c","d" }; When the following…… -
Java – resulset – cursor: rs.next() takes a lot of time
The cursor I returned from the database executes in 31 MS (milliseconds) But when I use this cursor to get more than 1…… -
Java – the jdbc driver throws a “resultset closed” exception on an empty resultset
I have a problem with the jdbc driver for SQLite I am using the select statement to execute the query If I get an empt…… -
Java – compare log4j and logger
Compare the logger of JDK with Apache log4j? Which is more suitable for a new project for Java 6? How do they compare …… -
Java – different series of xyline charts in different colors JfreeChart
I have created an XY line graph using JfreeChart. There are two data sets. I want both rows to be in different colors …… -
Java 7 switch statement, string does not work
According to the Java tutorials, in Java se 7 and later, you can use string objects in expressions of switch statement…… -
Reduce image resolution in Java
I need to use a java program to reduce the size of the image (not the width and height) I need to reduce the size from…… -
Why can’t violation parameter types in Java be overridden?
Java allows return types to be covariant when overriding superclass methods Why is it not allowed to use opposite para…… -
Java – use static variables in spring annotations
I am using spring's preauthorize annotation as follows: @PreAuthorize("hasRole('role')"); However, I have defined 'rol…… -
Java – a good tool for debugging verifyerror
I found bytecode verifyerrors notoriously difficult to debug JVMs provide little feedback, usually just the current cl…… -
Java – synchronization difference between field reading and volatile
In a good article with some concurrency tips, an example is optimized to the following lines: double getBalance() { …… -
Java – find the complement of color programmatically?
Is there any way to find the complement of the color of a given RGB value? Or can only find some colors? Will anyone d…… -
Java – implementation comparable to generic classes
I want to define a class that implements a general comparable interface In my class, I also define a generic type elem…… -
Java: freeze objects accessible from the final field
Dzone refcard entitled "core Java concurrency" points out: and I am not fully aware of the second statement Does this …… -
Java – what is the point of beans?
I have some JSP tutorials for beans. I don't understand what a bean class is All is to get and set methods Why use the…… -
Java – log4j what is the difference between rollingfileappender and dailyrollingfileappender?
What is the difference between log4j rollingfileappender and daily rollingfileappender? Solution read http://www.mail-…… -
Multithreading – deep analysis of the differences between CPUs and GPUs
I've been looking for the main difference between CPU and GPU, more accurately, separating the subtle differences betw……