包含标签：Java 的文章
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A large number of GCs in the company’s online virtual machines have led to a surge in STW and CPU — a process of cocooning and positioning
background There is a Tomcat service on the company's online, in which about 8 microservices are merged and deployed. …… -
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Do not rely too much on the expired monitoring of redis!!
Redis expired monitoring scenario In business, there is a need to wait for a certain time to execute a certain behavio…… -
This is an article from Alibaba’s internal technology forum
This is an article from Alibaba's internal technology forum. The original text has been unanimously praised by Alibaba…… -
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Java access rights
public Classes in the same package or in different packages can be accessed freely private Can only be used in this cl…… -
Application of Java this
package java04; public class DemoPersom2 { public static void main(String[] args) { Person2 person = …… -
What is a native implementation in Java?
See English answer > what is the native keyword in Java for? 9 public native int hashCode() protected native Object…… -
Java – hibernate composite key
Is it necessary to map the composite ID to the class? Can you do this? <composite-id> <key-property=..../&g…… -
Erlang processes and Java threads
I'm reading "elixir in action" book by SA š a Juri ć, And in the first chapter: Isn't that true for Java threads? I me…… -
Java – algorithm of 2D ray tracker
I want to write a programmed raytracer in Java for presentation purposes and give a general ray tracing presentation (…… -
Using java_ Opts env variable running Java is invalid
In the shell script, I set up Java_ Opts environment variable (to enable remote debugging and increase memory), and th…… -
When JavaMail is executed, all jframes are frozen
I develop the program of automobile management system Then, when the car comes in and drives, I want to send an email …… -
Java – error: unable to find or load the main class in the IntelliJ ide
I'm a beginner in Java. I'm trying to run my code using IntelliJ. I just installed JDJ 1.7 as my ide The following cod…… -
How to convert Java result sets to JSON?
I used the MySQL query of JDBC connector to get a result set So my job is to convert the result set to JSON format So …… -
Java replacement regular expressions do not work properly
Why doesn't this line of code work? It should replace all punctuation with nothing m = m.replace("[\\?\\.;:'\"]","") A…… -
The easiest to understand example of volatile keyword in Java
I am reading the volatile keyword in Java and fully understand its theoretical part But what I'm looking for is a good…… -
Implementation of Java JDBC interface
In JDBC, in order to connect and execute statements in dB, we mainly use connection, statement and resultset as interf…… -
What are JAVA memory management best practices?
I'm taking over some applications from former developers When I run the application through eclipse, I see a lot of in…… -
Java – attach a single action listener to all buttons
I have a program with many buttons, all of which will perform the same function I wonder if there is a way to attach a…… -
Java – play multiple sound clips using clip objects
I'm developing a program that contains a large number of JButton objects. I hope each object has its own Wav file In a…… -
Reverse single linked list Java
How to reverse a singly linked list in blocks of some given size in O (n) time in place? 4 public void reverseList(){ …… -
JAVA_ What is the reason for the existence of the home environment variable?
Many Java based applications need to set up Java_ Home env variable What is the purpose of this variable? Solution An …… -
Java – abnormal behavior of the zoom in and zoom out function of JfreeChart?
I observed that the functions of "zoom in" and "zoom out" were completely different from those expected For example, w…… -
Java – is there a way to run methods / classes only when Tomcat / wildfly / GlassFish starts?
I need to delete the temporary files during Tomcat startup and transfer them to the folder containing the temporary fi…… -
Java – populate JfreeChart timeseriescollection from MySQL DB?
I'm trying to create a chart in my application that will return the temperature in a few months This chart is a JfreeC…… -
Return date type in Java format
See the English answer > change the format of date Java [closed] Example: original date: 2018 / 01 / 01t15:00.00 00…… -
Java – unable to get okhttp’s response body. Tostring() to return a string
I'm trying to get some JSON data using okhttp, and I can't figure out why when I try to record response body(). The re……