Recent Posts
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Java – is JDBC secure?
I am a novice in JDBC. The new project requires me to use JDBC What I want to know is, Is JDBC secure? How to prevent …… -
Java – type set is not universal; It cannot be parameterized
My eclipse faces this strange problem Type set is not universal; It cannot be parameterized with the parameter < in…… -
Java collection filtering
I have such things: public class Foo { public String id; } and Vector<Foo> foos; I need to get an object from …… -
Java – eclipse type erasure
I have a method defined like this: public <T> T methodName(Class<T> clazz) My unit test I mistakenly teste…… -
Java – how do I check the number of objects created in heap memory?
I want to see how many objects Java creates when running the program My intention is if I use the code string s = new …… -
Java – endpoint with OAuth: get the current ClientID
I just started using endpoints in Google App Engine, and everything seems to work well My API rejects non whitelist cl…… -
Java – JPA onetomany list cannot find mappedby attribute that should be inherited
We are currently making some requirements. We must add some similar entities (car pictures, pet pictures, holiday pict…… -
Java – one to many one-way parent-child ID cascade saving
When I try to save the ID from the parent class to the child class, I keep getting errors I tried all types of mapping…… -
Java – sort the vectors of custom objects
How to sort the vectors of custom objects and select the attributes to sort? I do see this question & answer, but …… -
Java – how to allow users to drag and drop releases in vaadin tables?
I have a multi - row table with custom components I want to allow users to delay the release I tried the following cod…… -
Java – why doesn’t my code compile which string starts with a vowel check?
if (flipped.charAt(0) = "a" || "e" || "i" || "o" || "u"){ if (flipped.charAt(0) = "a" || "e" || "i" || "o" || "u"){ …… -
Java – multipart resolver does not process multipart requests
I recently made some changes to my spring application by adding CSRF support To do this, I must also change the way I …… -
Java – Android WebView, zooming content to fit the screen
My friend created an application using JavaScript and uploaded it to his website Now I'm trying to wrap it in WebView …… -
Java – where to restore the user’s purchase within the application?
I've been following the junk Google tutorial, but it doesn't mention where to put code to restore user purchases In th…… -
Java – antimalware service executable slows down IO operations
I have a java program that writes some temporary files in the temporary directory The temporary directory is located o…… -
Move STD:: vector to STD:: deque in C 11
If I have STD:: deque and STD:: vector and want to combine them into STD:: deque, I can do it in the following ways: t…… -
Javac for dynamic compilation does not work
I'm trying to compile a HelloWorld class as a test, which shows an error I don't know how to solve It seems that it is…… -
Java – dead code warning in try with resources, but not in try catch finally in translation
The following code uses the try - with - resources structure introduced in Java 8 Occasionally, the throw () method is…… -
Java – spring security returns 302 when attempting to log out
I use spring security (4.0.2. Release) to protect my application I can log in normally and my authenticated URL is pro…… -
Java – return stream from custom data structure class
I'm developing a program to create a custom LinkedList generic class. I hope to generate a stream from it by calling s…… -
Java – why does spring nativequery with paging throw an sqlgrammarexception?
I tried to use spring 4.2 Run the following query in 4: @Query(value="SELECT * FROM (SELECT ROW_NUMBER() OVER(ORDER BY…… -
Java – try the method again for some exceptions
I have the following methods to retrieve information from the server using a proxy Sometimes due to proxy errors, I ge…… -
Java – insertionsort using multidimensional arrays
In my code, I receive the values n and D on the first line. N will be the number of values I want to write, and D is t…… -
Java – the previously created encoding file cannot be read correctly
I have a problem reading the encoded file. I have written my own code before Display the original string correctly (in…… -
Java – a strange runtimeException occurs when running an Android Application on some devices
I recently made an Android application and released a beta version to someone for testing purposes Everything seems to…… -
Java – filter the object only if the predicate input is not an empty string using guava
I'm learning guava now. I have a problem I have three possible string filters The problem is that I just want to filte…… -
Java – download stream files through resttemplate
I have a large file download, which is provided by the restcontroller on one server. I need to stream it through the r…… -
Java – you cannot use XML via maven unmarhsal
I have JUnit test, it is unmarshal, my XML object is good, its work! However, when I run the Maven command MVN surefir…… -
Java – filter ArrayList after converting long (from constructor) to string
I store this long value in the database as datetime. I have a question about how to filter these records according to …… -
Java – can I select a file name in the Jfilechooser window?
I can set the default file name in the Jfilechooser window using the following command: fileChooser.setSelectedFile();…… -
How to simulate Java net. NetworkInterface？
I'll test one in Java net. The networkinterface list is used as a parameter method, so I should simulate the final abs……