Recent Posts
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Java – incompatible types and fresh type variables
I get the following compilation message: [javac] ... error: incompatible types [javac] exceptionClassHolder …… -
Java – save files to SharePoint Server using jax-ws
I tried to save a file to a SharePoint Server using Jax - WS The web service call reports success, but the file is not…… -
Copying fields between classes in Java
I have a pair of classes. The field of one class is a subset of the field of the other. The getters of superset classe…… -
How to install the gson module in Java?
I downloaded the Google JSON module a.k.a gson I am a Windows system. Can you tell me how to install the gson module? …… -
Java – what are the benefits of extending generics by specifying new types as the actual types of generics
I saw this pattern somewhere: @ h_ 403_ 2@class A extends B { } This structure is somewhat unusual for extending gener…… -
Java – error adding edit text in eclipse
I'm building Android apps for tablets I tried to add an EditText in the graphical view of eclipse, but when I selected…… -
Using Java’s recursive expression evaluator
I want to write an expression evaluator that only does addition and subtraction I have a simple algorithm to do this; …… -
Java – how to disable errorpagefilter in spring boot?
I am creating a soap service that should run on Tomcat @Configuration @EnableAutoConfiguration(exclude = ErrorMvcAutoC…… -
Jpa-2.0 – execute @ postload_ after_ Eagerly extract?
Using JPA2 / Hibernate, I created an entity a with a one-way mapping to entity x (see below) In a, I also have a tempo…… -
Java – how to set the ForeignKey name when I have @ manytomany
I am using JPA class to create database If we have a manytoone relationship, we can override the ForeignKey name, as s…… -
Java – “a value of type string cannot be opened below the source level..” error
I am using eclipse to develop a java program I had to downgrade JRE and JDK from 1.7x to 1.6 Now everything points to …… -
Java – Maven cannot find dependencies
I use Maven 3.1 Version 1 I'm trying to compile with dependency springs I see that this should exist in Maven through …… -
Java – LinkedHashMap signature
Looking at the JDK source code of LinkedHashMap, I notice that this class is declared as: public class LinkedHashMap&l…… -
Java – why do you get a NullPointerException when comparing a string with null?
My code uses NullPointerException to break in the following line: if (stringVariable.equals(null)){ Before this statem…… -
Java – when to use servicetracker and servicereference
I've just started using OSGi programming, and I've encountered two ways to listen to activated services The first meth…… -
Java – you can mark interfaces, such as serializable, which contains default methods?
I don't think it can, because the principle of markup interface is that there is no method, but I don't know because t…… -
Java – how does akka implement the relationship before JMM?
In the official akka document, they refused: For details, please refer to the doc I wonder how akka did it I just pass…… -
Java – where to run complex algorithms? Server or client?
I'm trying to develop a social network Android application with a huge user database I am very new to android app deve…… -
Can the Java – pluggable annotation processor API retrieve source code annotations?
I am using the pluggable annotation processing API with Java 6 to automatically create some deployment XML files Some …… -
Java – how do I get the hashtable value as an ArrayList?
Hashtable How to convert its value to: ArrayList <Word> arr thank you. Solution Use the ArrayList constructor t…… -
Java – how does akka implement the relationship before JMM?
In the official akka document, they refused: For details, please refer to the doc I wonder how akka did it I just pass…… -
Detailed explanation of the implementation method of explosion effect of view in Android
This paper describes the implementation method of the explosion effect of view in Android. Share with you for your ref…… -
PHP uses phpmailer to send mail instance parsing
I'm a novice. Because I want to send verification code by email, I can find and collect these. I can use 163 email in …… -
Create multiple shortcuts for Android apps
Sometimes, if we want our application to create multiple shortcuts on the desktop, we can use manifest The correspondi…… -
Background picture of infinite loop of Android actual combat aircraft game (2)
Firstly, analyze the elements in the game interface: infinite rolling background picture, operable protagonist, protag…… -
Android imitates the cascade fade in and fade out display effect of the to circle profile interface
The implementation effect of a simulated to circle personal data interface made a few days ago The following is the ef…… -
Android customized surfaceview to realize Sketchpad function
After having been in contact with view for so long, we can't stay in view all the time. From now on, we need to learn …… -
Implementation of Android text stroke function
Here also want to briefly say that these small modules were not my original, but also found by looking up the material…… -
Android ormlite changes the default location of the database
preface The ormlite database is placed under databases by default. Sometimes you may need to use the database with pre…… -
Android SMS verification code
In the process of developing app, SMS verification is an essential operation when users register. Here we use a free t…… -
Java – SSL connection reset
I tried to connect to an HTTPS endpoint via Java Each method I tried (more details below) eventually generates this st…… -
How does the Java – immutable object help reduce the overhead caused by garbage collection?
I'm a novice. I've seen garbage collection in the previous two answers here Now, even if programmers have to create ne……