Java
-
Convert object [] array to int [] array in Java?
There seems to be no simple way to do this, but this is what I have done so far. If someone can correct it, its work w…… -
Java – reset auto increment in H2
I'm testing a controller that returns a JSON response but doesn't @Before public void setUp() { Fixtures.deleteAll…… -
Java starts another Java application
I'm building a wrapper jar for the jar I built It will handle updating the main application and ensure that the user i…… -
Java regular expression, but matches everything
I want to match division * Everything except XHTML I have a servlet to listen to * XHTML, I want another servlet to ca…… -
Tyrus – simple java application – implementation class not found
I am developing simple applications to help me learn the concepts of websocket and Tyrus in Java This is my server (se…… -
Why do we prefer primitives and boxed primitives in Java
I'm reading the second edition of valid Java and page 23 // Hideously slow program! Can you spot the object creation p…… -
Java – HashMap return method
I have a method in my class, which initializes a HashMap and puts some keys and values in it, and then the method retu…… -
Where is setvisible in the Java – NetBeans palette?
I use NetBeans in design pattern to make a GUI I'm looking for a property corresponding to Java's setvisible method, a…… -
Gson, jsonelement, string comparison in Java
Well, I want to know that it may be very simple and stupid, but after a period of struggle, I don't know what happened…… -
Java – monitor changes to collections
Suppose you have the following Java beans: public class MyBean { private List<String> names = new ArrayList&…… -
Why – in Java 1.8 – use functions instead of functions?
The order seems strange because in regular Java, the return type is always specified first For example: public static …… -
Use java to convert SOAP message format to socket message format, and vice versa
I am currently using java to study the conversion from SOAP message format to socket message format, and vice versa I …… -
Java – perform default tasks in ant in case of failure
I am currently using ant to build my java project on a Windows XP machine thank you Solution Google and found this It …… -
Java – is there any way to listen to the method execution of another class?
Can I listen to the method execution of an instance or all instances of a class without modifying the code? someInstan…… -
The Java – @ aroundinvoke interceptor is called twice on the @ WebService class
abstract Call the @ aroundinvoke interceptor twice on the @ WebService class. If the intercepted method is called from…… -
Java – espresso 2.0 – methods using @ test annotation in classes that extend junit3 testcase
When I use the new activityinstrumentationtestcase2 class shipped with espresso 2.0, I get a strange warning method. I…… -
Java: null in constructor
Excuse me, this question is a bit theoretical, but I want to understand it Why do I pass null parameters to constructo…… -
Java discards half of UDP packets
I have a simple client / server setup Server in C, the client of the query server is Java My problem is that when I se…… -
Java – stop and start JBoss programmatically in eclipse
Can JBoss be started and stopped programmatically in eclipse? I am using indigo eclipse Java EE, and I have a JBoss 5.…… -
How do I get node boundaries based on a specific ancestor in JavaFX 8?
I added a chart in anchorpane. I want to get the boundary of its chart (chart chart, I mark it with cyan), so that I c…… -
Java 8 type inference error, assigning lambda expression to variable of object type
Why does the java compiler complain about the first statement? This is because the expression () – > "" does not ha…… -
Java – multiple conditions in ternary conditional operators?
I'm in the first semester of Java programming. We just introduced the conditional operator (?:) condition I have two p…… -
Java – why is my null check so slow?
So my code looks like this right now public boolean in(TransactionType... types) { if (types == null || ty…… -
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……