Java
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Java – generic filter for enumerations
The following is my class public final class Test { enum Animal {DOG,CAT}; enum COLOR {RED,YELLOW}; class Meaningless…… -
Convert this null check to Java 8 optional
I can't understand how to delete the following null check using java 8 option for (A objA : listOfObjectsA) { if (…… -
Java – JSF inputtext and sessions in JSF managed beans
I want to know how to read the value of the input text from the managed bean @H_ 502_ 9@ @H_ 502_ 9@ <h:inputText i…… -
How to use multithreaded scripts
I am here http://www.get-blog.com/?p=189 Found this multithreaded script Param($Command = $(Read-Host "Enter the scrip…… -
Setting namespaces and schemas using java DOM
There is a root element without attributes in my output XML document: <?xml version="1.0" encoding="UTF-8" standalo…… -
Java – why can’t I get filechannel from filewriter?
I wonder why getchannel is only implemented in fileoutputstream instead of filewriter Is there any real reason? Is the…… -
Java – spring boot 2.1 embedded Tomcat – incorrect keystore password
Update – > add security addProvider(new BouncyCastleProvider()); Solved this problem Adding ActiveMQ broker to my c…… -
Java – get customer orders: set getallorders() and set getallorders()
I haven't done much Java programming, so many unresolved ORM problems come to mind and seem quite direct to more exper…… -
Java fuzzy type method?
Editor: This is not a code problem at all, but there is an error in the groovy Eclipse Plug-in（ http://jira.codehaus.…… -
Java – JUnit test case – set data
I have a simple crud operation that needs unit testing So I have one test case for creating, another for updating and …… -
Java – is there a way to hide annotations in NetBeans or eclipse?
It may be a silly question, but it would be nice to have a way to hide or collapse Java comments when viewing source c…… -
Java – HTTP request object
Is there an object in standard Java se that can accept HTTP requests from sockets? I've found how to create and send o…… -
In general, what does Java mean when it returns “incorrect parameters”
I am creating such a file try { File file = new File(workingDir,obj.getName() + ".xls"); outputStream = new Fi…… -
How to dynamically determine the number of goroutines to process tasks
I wrote a virtual code to prove the purpose There are two channels and three goroutines in the code 1 goroutine genera…… -
The method filter (predict ) in Java – stream type is not applicable to parameters ((E) – > {})
How to set the value in Java 8 in the filter? I want to set emailid to null, where firstname is Raj How can I do this …… -
Java Swing: customize everything – subclass JComponent or JPanel or?
Hiya – the fast one – does the subclassing of JComponent have any damage / value compared to JPanel? For me, if I'm ma…… -
Java – why does Maven assembly plugin place the same dependencies in my zip multiple times?
I put the assembly descriptors together <assembly> <id>all</id> <formats> <format>zi…… -
Is the tag a Java statement?
Whether the tag is a Java statement and whether the tag is a statement defined as a statement in the Java language spe…… -
Java-8 – how to filter a list, which is the value of the map entry in Java 8?
I have a map < B, list < a > > I want to filter out some a based on some predicates that depend on the key…… -
Dynamically create tables and Java classes at run time
There are requirements in my application My table is not defined in advance For example, if a user creates a form by n…… -
Java – print all strings from the list by passing in a char variable
I need to print all strings in the list by passing in a char variable When I have something I like, for example, I pas…… -
How do I send an EOF for a Java InputStream element?
So I have the following code to open the input stream and successfully collect information: httpInput = httpconnection…… -
Delete temporary Internet files for Java
In the Java control panel on windows, there is the setting of "temporary Internet File", in which all applet and webst…… -
Look and feel in Java
I work a lot with the look and feel in Java and it works well, but the only problem is that the only component that ha…… -
Java – spring and scope properties
I have a problem learning spring and need some help I'm learning the scope of the bean prototype, which basically mean…… -
Java – understanding integer Logic behind the implementation of highestonebit() method
The Java integer class has a static method, highestonebit method, which will return a value with a single bit, which i…… -
Java 8 stream priority filtering
My code looks like: for (SomeObject object : objects) { if (object.getSomething() == Something.somethingHighPriori…… -
Java – an unexpected error occurred when using the expression language only for a specific attribute in JSP – please check this item
I have this unusual situation: I have a registrationvo, which has few properties and getter setter For example, city o…… -
Java modifies UTF-8 strings in Python
I connect to Java applications through python I need to be able to construct byte sequences that contain UTF - 8 strin…… -
Run a Java application as a background process
I have made an application using java When I install it on my computer... I want it to run as a background process rat…… -
Java – traps in JDK 6
Are there any problems in JDK 6 that do not exist in previous versions? I'm interested in timestamp Some surprising ch…… -
Java – keyloak missing form parameter: Grant_ type
I ran the keycloak standalone program on my local computer I created a new realm called "spring test" and then a new c……