Java
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Java – eclipse link: there is no persistence provider named entitymanager
I want to create a bundle that can use Java persistence To do this, I created a plug - in project in eclipse In my pro…… -
Print * as triangle in Java?
My task in java course is to make three triangles One left, one right and one center I have to create a menu of why ty…… -
Java – spring singleton has been created many times
I have defined a bean in my spring web application. I want only one instance of this bean. This is my bean definition:…… -
Java – get HashSet from the key of HashMap?
I have a very large (100'000s entry) HashMap Now, I need a HashSet that contains all the keys in this HashMap Unfortun…… -
Java – using the comparable vs TreeSet list
Option 1: create a list that implements comparable and use collections. Net each time you add a value Sort (List L) so…… -
Caught “Java. Util. Concurrentmodificationexception”
This is my code: // eventList is a LinkedList public void run() { Iterator<Event> it = eventList.iterator(…… -
Java – spring: a bean that receives a list of classes
I want to define a bean in my spring XML context, which has attributes of type list type: List < class > class …… -
Java generic type parameters
I have a method that uses list As an argument public static String method(List<?> arg){ // Do something ba…… -
Java – classnotfoundexception when including library jar
In my android project, I added a library jar. Jar in the LIBS folder >Google gson (COM. Google. Gson) > JBoss ne…… -
How do I convert strings to hexadecimal and hexadecimal to strings?
I made a simple program for sending and receiving data through the serial port in Java I connect the serial device to …… -
JUnit – the unit test of the spring boot actuator endpoint is invalid when the port is specified
Recently, I changed my spring boot attribute to define a management port I wrote a unit test for the test / metrics en…… -
Automatically update rows in tableview from the model
I've been looking for information about refreshing data to tableview I tried to modify the model directly, but I got a…… -
Java – ActiveMQ web console is not suitable for embedded agents
I have an embedded agent that is completely configured through Java code (no deployable XML file) When I point my brow…… -
Java 8: how to use lambda expressions to copy the value of a selected field from one object to another
I'm trying to understand java 8's new functions: foreach and lambda expressions Attempt to override this feature: publ…… -
Java – Trace allocation of int []
When viewing my remote application in the jvisualvm through JMX, I found that I saw the memory usage when I was idle: …… -
Use the keyset () method and change the set to string array? Java
So it should be very simple because I know it's possible (I just don't know 'set') So basically there is this treemap,…… -
Java – dynamically change the number of nested for loops
I don't know if this is a stupid question, but I need to dynamically change the number of for loops without recursion …… -
Java – convert image to black and white – failed, bright color
I tried to convert the image to black and white only (not grayscale) I used this: BufferedImage blackAndWhiteImage = n…… -
Where can I find Java 8 Src zip
I just unzipped JDK 8.0 on XP according to the following link installing JDK8 on Windows XP – advapi32. dll error But …… -
Java – spring social LinkedIn: is there an API that can be used to retrieve user items?
I am currently using spring social LinkedIn 1.0 0. Please log on to my website I have a feature that I need to access …… -
Java – how to create a new database in Oracle 11g Express Edition?
I am a novice in Java. I have installed Oracle Database 11g Express Edition and SQL developer How to create a new data…… -
Java – get the number of simulated calls
Suppose I want to test such code: class ClassToTest // UsedClass1 contains a method UsedClass2 thisMethod() {} Use…… -
Will the latest version of Java 6 use JavaFX 2 out of the box
Since Java 7 is not as popular as Java 6, I wonder if you can use WebView and other things in the latest update of Jav…… -
Java. With error Selectonemenu of lang. string cannot be cast to javax. String faces. model. SelectItem
I want to fill in a selectonemenu, but there is always this error: java.lang.String cannot be cast to javax.faces.mode…… -
How to use untyped Java util. List to scala 2.8 buffer
I have to call some Java. Java that returns no type util. List. It seems that I can't convert it to scala 2.8 list wit…… -
Can you use a concept similar to the keyword args in Java to minimize the number of accessor methods?
I recently learned that in Python 3, in order to minimize the number of accessor methods of a class, you can use the d…… -
Java – what does shadow plugin gradle: mergeservicefiles() do?
In my build In the gradle file, I need to add the following lines: shadowJar { mergeServiceFiles() } Otherwise, th…… -
Java – viewpagers in listview displays blank list items
[editor]: Thank you for all your meaningful answers. Now the problem is solved. Thank you for your help Similar proble…… -
Java Generic of Another generic
I have an interface: interface Identifable<T extends Serializable> { T getID(); } And the class that imple…… -
Java client server game with applet
I have to implement a simple tourist client server game in Java Unfortunately, I just started with network programming…… -
Java – a thread pool that handles “duplicate” tasks
I want to perform some different tasks in parallel, but there is a concept that if a task has been queued or is being …… -
How to use a loop to delete elements from a queue in Java
I have such a data structure: I'm trying to do this: for(Mail mail: mail@R_476_2419@) { if(badNews(mail)) { ……