Recent Posts
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Java – how do I avoid closing the InputStream passed to my method wrapped in the reader stream?
I'm creating a Java method that accepts a single InputStream as a parameter To facilitate the use of character based s…… -
Follow the JavaFX MySQL connection example
Anyone can give me an example of a class connecting JavaFX and mysql. I don't want the main class. There is one. I jus…… -
Java – how to convert file delimiters in maven
I have an attribute defined as follows: <properties> <main.basedir>${project.parent.basedir}</main.…… -
Java – how to understand OUTOFMEMORY or stackoverflow errors in advance
In Java, is there any way to know that stackoverflow errors or OUTOFMEMORY exceptions may occur soon? If a can program…… -
What library do I need, so I can visit this com. Com in Java sun. image. codec. jpeg？
I created an image watermarking program in Java. I imported the following contents: import com.sun.image.codec.jpeg.JP…… -
Java – algorithm for looping arrays from the middle to the outside?
I'm working on a divide and conquer algorithm (actually fitting the curve to multiple input points) For the "split" pa…… -
Using Java IO seeking bytearrayinputstream
How to find (change location) bytearrayinputstream (Java. IO)? This is obvious, but I can't seem to find a way anywher…… -
Java: can integer = null be set?
If this parameter exists in the database, I have a function that returns the ID number If not, null Is this begging fo…… -
Java hash map thread visibility
I fully loaded a Java HashMap during initialization, but after initializing multiple threads, the HashMap will read th…… -
Implementation of counting using group in Java 8
I am looking for the implementation of group by, and then filter it according to the count in the lambda expression se…… -
How to automatically improve debugging in symfony2
I tried to debug using symfony2 before, and dealing with cache is a great pain Solution I'm on the app_ This code (bas…… -
Warning: jsf1074: a managed bean named “bean” has been registered
I'm using mojarra JSF 2.2 The bean we define is based on anonation, for example @ManagedBean(name = "codeBean") @ViewS…… -
How to map lambda expressions in Java
I come from Python and try to understand how lambda expressions work in Java In Python, you can do the following: opdi…… -
Java – how to return specific types when implementing a common interface
I have an interface that will be implemented by several different classes, each using different types and return types…… -
Embedded – how to debug unexpected resets in STM32 devices?
I'm doing some development in C using stm32f107 chip, and sometimes when I call a specific function, the device starts…… -
Java – last inserted value in DB
There is already an answer to this question: > how to get a value from the last inserted row? 14 When I insert a ro…… -
The keylistener event is obviously not triggered in the Java applet
I've just started learning to program applets and Java GUIs. I'm trying to make a simple game At present, I have main …… -
Java – why do anonymous classes catch “this” even if they don’t need it?
In view of this Code: class Foo {} public class Test { public Foo makeFoo(String p,String q) { …… -
Java – find out which classes use a given API
In my java project, I want to find out which classes use the given API from the program Is there any way to do this? C…… -
Java – how to map a set of string objects using JPA annotations?
@Entity @Entity public class TestClass implements Serializable{ private Integer id; private Set<String> …… -
How do I create a key pair in Java based on a password?
I want to allow Alice to create a public / private key pair so that Bob can send her confidential messages However, I …… -
Java – hashcode, implementation and relationship with HashMap
So I asked another related question here: Java string hash function with avalanche effect, but now I have a different …… -
Delay multiple TCP connections from Java to the same machine
(see this question in serverfault) I have a java client using socket to open concurrent connections to the same machin…… -
Focus debugging in Java
Question: I'm trying to debug some focus related issues in my Java Swing application. Sometimes, some components seem …… -
Java – use the stream to find objects in the list
See the English answer > why filter () after flatmap () is "not completely" lazy in Java streams? 6 // returns [i,j…… -
What is jar signing in Java?
What is a jar signature? Can we customize it? I mean, have your own signature Solution Jar signature is the process of…… -
Java – how to add support for resizing when using an undecorated JFrame?
I want to customize my title bar, minimize, maximize and close buttons So I use setundecorated (true); On my JFrame, b…… -
Java BigDecimal triangulation
I am developing a mathematical parser that can evaluate strings, such as' 5 b * sqrt (C ^ 2) ' I am using ANTLR for pa…… -
Java – how to access enum field in playframework template
I have an enum, which has some fields that I need in play1 2.4 access in template public Enum WORKER{ FARMER,SMITH,…… -
JavaFX bean binding suddenly stops working
I use JavaFX numberbindings to calculate certain values At first, everything worked as expected However, after a fairl…… -
Java – spring data repositories – find the where field in the list
I am trying to use spring pagingandsortingrepository and find myentity, where the fields in fieldvalues are queried as……