包含标签：Java 的文章
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Java – the default date year is set to 1970
I need to parse a string with no year set But when I output the date, it will increase the year. I tried to set the ye…… -
Java – how to get foo Object Value?
(this is a follow-up to my previous question) I have a foo Object, foo Foo < T > is an interface How to get hid…… -
Java – UML represents an anonymous class in the class diagram?
How to represent Java anonymous classes in UML class diagrams? Solution Illustration: resources: >UML class diagram…… -
Java adds a string to a string array
See English answer > java dynamic array sizes? 18 static String[] ipList = {"127.0.0.1","173.57.51.111","69.696.69.…… -
Name conflict in Java import
Unless we change the compiler, Java missed importing x as y syntax, which would be very useful in my case: at this mom…… -
Java – liquibase attempts to apply all changesets, even if the database exists
I use spring - liquibase to perform any migration required to stage the database applicationContext. XML looks like &l…… -
Java – calculates the number of “trues” of N Boolean values
Boolean a,b,c,d; Boolean a,b,c,d; I want to count the number of trues. Each result should have its own associated acti…… -
Is java suitable for “Web 2.0” applications?
A few days ago, I chatted with someone who suggested that rails and PHP are the most suitable platforms for web applic…… -
Java – optimal time complexity of string reverse operation: O (n) or O (n / 2)?
The following is a snippet of string inversion private static String reverseString(String originalString){ char arr[]=…… -
Java – when to call getwarnings() on connections, statements, and resultset using JDBC?
In JDBC, connection, statement and resultset types all have getwarnings () method, which is specified to generate the …… -
How to use java to get all text files from a folder?
I need to read all ". TXT" files from the folder (the user needs to select this folder) Please tell me how to do it? S…… -
Java – how to dynamically change jlabel
I have a jlabel and a button. Jlabel displays the number of button presses, but I can't calculate how to update the jl…… -
If there is no system Out, what about printing on the console?
I recently encountered a problem in an interview The problem statement is – > assuming that you cannot access the s…… -
Java sliding jpanels
I have a menu showing various buttons. I can make the buttons call their respective jpanels when clicked The thing is …… -
How to centralize JavaFX controls
More specifically, why is my JavaFX control not centered? Here are two screenshots. The first one is after the beginni…… -
Java – writing files in clojure
I am using this function to write files in clojure (defn writelines [file-path lines] (with-open [wtr (clojure.java.…… -
Java NiO – memory mapped file
I recently encountered this article, which provides a good introduction to memory mapping files and how it is shared b…… -
Iterates over generic arrays of any type in Java
If there are Java collection instances that can carry primitive types, generic arrays, and / or iteratable collections…… -
Java 8 nested loop flow
Try to understand java 8 stream syntax through a simple example Look at other similar problems on this topic, but I ca…… -
Compiling java files using Java programs
Is it possible for programs written in Java to compile files using the JDK compiler (in addition to using java to open…… -
Can a java program know its current directory?
Can a Java application know its own current directory I am referring to the results of PWD For example, when executing…… -
Java – create a new instance class reference
I have an enumeration like this: public static enum TestEnum { // main ENUM_A (1,"test1",TestADto.class),ENUM…… -
Returns a list of nodes in a Java node. A parent node can have multiple child nodes
I'm trying to write java code to return a list of nodes in the tree The node class is class Node{ String label; List…… -
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……