Java
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Java – set the default heap size in windows
See the English answer > how to increase Java heap memory permanently? three Solution Java_ Opts is set to a system…… -
Java – meaning and solution of spring 3 error message “getresponsebodyasstream is recommended”
I am using spring 3. Every time I submit an HTML form to the spring control, I receive this message. I don't understan…… -
Get the nth element from the list using the Java stream
I have a list of strings, such as "/ 100" "/ 100 / 200" As we all know, the length n of each internal list is the larg…… -
Java – Google Guice: provider with parameters
I have a constructor that depends on classes a and B I define it as follows: @Inject TestClass(A a,B b) Is there any w…… -
Java – synchronization – reordering obstacles in two directions with the edegs Compiler?
I have a question about the JAVA memory model The following examples are given: action 1 action 2 synchronized(monitor…… -
Adjust the brightness and contrast of bufferedimage in Java
I'm using some frameworks to process a bunch of images. All I have is a bunch of buffered image objects Unfortunately,…… -
Java – SVG / vector graphics object Boolean operation (Union, intersection, subtraction)
I have two-dimensional closed vector paths, which are specified in SVG paths like syntax, that is, these paths include…… -
Deserialization of embedded Java objects
I have to deserialize the following JSON to use the Jackson library to enter the client class { "code":"C001","city…… -
Why is the JavaMail connection timeout too long
In my application, I connect to the server to authenticate users This is the code: try { Properties prop = new…… -
Use prepared statements and variable bindings to use JDBC drivers in Java
I'm using it >JDBC template enables JDBC to connect to a MySQL Database > prepared statements to protect itself …… -
Java – Google App Engine 1.6 4 local slow?
Original problem Because I started from 1.6 3. Change the version To 1.6 I encountered serious performance problems wh…… -
Deserialization – for Java util. Gson deserializer for date
Does anyone have a deserializer job? Do I get the full JSON expression in the method "deserialize" instead of the elem…… -
Java – cannot instantiate type httpclient
I've taken it Jars is added to my library, and I can instantiate other classes in jars What gives? I tried to clean up…… -
Java – JNI, call boolean method
I get a Java method, get a string and return bool I call it JNI this way: jmethodID function2ID = env->getmethodID(…… -
java. lang.ClassNotFoundException：org. apache. commons. lang.exception. NestableRuntimeException
I tried to retrieve data from the database When I run the program, it displays the error Java lang.ClassNotFoundExcept…… -
Asynchronous task pattern in Java
As I moved from c# to Java, I needed to implement a set of asynchronous tasks I have a good understanding of Java thre…… -
What is the difference between Java – takeWhile and filters?
How is takeWhile () different from filter () in Java 9 What additional utilities does it have? Stream.of(1,2,3,4,5,6,7…… -
Is there a Java equivalent Python Eval function?
Is there a Java equivalent Python Eval function? This will be a function that uses an arbitrary string and attempts to…… -
Java – removes the “first” object from the collection
In some cases, I need to expel the earliest elements in the Java collection The collection is implemented using linked…… -
Deserialization of embedded Java objects
I have to deserialize the following JSON to use the Jackson library to enter the client class { "code":"C001","city…… -
Java – unsupported major Minor version 49.0
When I log in to my application, I get the following exception What does that mean? How can I solve the problem? Solut…… -
Java – eclipse (using J2EE plug-ins) does not build class files into the output directory
I have several versions of eclipse that have this problem In some cases, eclipse does not output bytecode class files …… -
Java – can some unit tests be ignored?
I am developing a project that uses JUnit 4 widely in all modules We are using Maven 2 to build the project, and Hudso…… -
Is there any way to modify the value of the “private static final” field in Java?
I know it's usually stupid, but don't shoot me before reading this question I promise I have a good reason to do this:…… -
Simple natural language processing to start Java
See English answer > is there a good natural language processing library [closed] 3 Unfortunately, I didn't see any…… -
Java – integration test using redis
With the help of jedis library, I began to use redis.com in my project All work normally, but now I have a problem. My…… -
Java – how to apply spring boot filters based on URL patterns?
I created a spring boot filter – implementing genericfilterbean with the @ Component annotation @Component public cla…… -
Java – displays a histogram of image data
Sometimes I need to display the representation of image data in the form of a histogram I am particularly interested i…… -
Java – any tutorial on the official GWT MVP framework?
Has anyone found / written any tutorials in the official GWT MVP framework found in GWT 2.1 RC? Solution Google has up…… -
java. lang.reflect. Method. Name comparison in equals (object obj)
The following is Java in Java 7 lang.reflect. Method. Implementation of equals (object obj): /** * Compares this {@co…… -
Java – XPath for finding ancestor nodes containing CSS classes
I'm writing some selenium tests. I need to be able to find the ancestors of the webelement I've found This is what I'm…… -
Java – vertical header file in JTable?
Is there a way to rotate the JTable column header 90 degrees? Solution View Darryl's vertical table header cell render……