包含标签：Java 的文章
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Java transformation
Including upward transformation and downward transformation Upward transformation @ h_ 301_ 6@ -
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How to quickly create millions of test data
scene During SQL optimization or query performance test, we need a lot of data test to simulate. At this time, a probl…… -
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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Application of Java this
package java04; public class DemoPersom2 { public static void main(String[] args) { Person2 person = …… -
Javafx-8 – launching a JavaFX application from another class
I need to start a JavaFX application from another "container" class and call the function on the application, but ther…… -
Java – what is the best practice for rounding floating point numbers to 2 decimal places?
See English answers > how to round a number to N decimal places in Java 29 I need to round the floating point value…… -
Java – how do I get the start and end ranges from the timestamp list?
I have such a timestamp string: 2016-01-14T22:43:55Z 2016-01-15T00:04:50Z 2016-01-15T00:44:59+08:30 2016-01-15T01:25:3…… -
Java – use jinternalframe and some buttons
Can we use jinternalfame with buttons in the main frame? Of course, the framework contains jdesktopane How about this …… -
Java splits strings into arrays
See English answers > java string split removed empty values 6 String values = "0|0|0|1|||0|1|0|||"; I need to put …… -
How to add rows and columns to JavaFX 8 tableview
I saw an example of adding rows to tableview on the Internet, such as using the person class in Oracle documentation B…… -
How to add shortcut keys to JButton in Java?
I have a JButton and I want to assign a shortcut to it Just like I press delete it on the keyboard, just click JButton…… -
Java – how to insert objects in an ArrayList at a specific location
Suppose I have an ArrayList of an object of size n Now I want to insert another object at a specific location, assumin…… -
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……