包含标签：Java 的文章
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Java – why can I assign a value to a char variable without explicit conversion?
I wonder why this clip works char ch1; ch1 = 'a' + 1; System.out.println(ch1); In line 2, instead of promoting the rig…… -
Java – short for bitwise operations
I use a technology called DDS. In IDL, it does not support int. therefore, I think I will use a short one I don't need…… -
Java – why can’t my JNI code successfully find the GetMessage method of jthrowable?
I'm trying to access the message in jthrowable and handle the exception generated when the class cannot be found Howev…… -
Java – how to sort the values of the HashMap freemaker template
I have this HashMap in Java: HashMap<String,String> map = new HashMap<String,String>(); map.put("k1"…… -
The JPA / Hibernate timestamp is not saved in the database / object entity
I'm using javax Persistence as my entity object MySQL for database @Column(name = "ENTRYDATE") private Date entryDa…… -
Java – how to resolve exceptions in bufferinputstream mule, the type of message payload
I've converted to a byte array, but I keep getting this error: ERROR 2015-02-25 11:12:30,517 [[ESR].HTTP_Request_Liste…… -
How do I detect completed resizing operations in JavaFX?
I have a stage, a scene and a WebView node When I expand the window to a larger size - things get very slow due to Web…… -
Java – find Net 3.5 / J2EE architecture concept comparison article / chart
We're thinking about bringing the Net technology combined with Java Technology (WCF, JBoss / ESB, mom, WPF, WF), I nee…… -
Java – disjoint set data structure that supports deletion
Suppose we have a set of N disjoint nodes {node1, node1,..., noden} What is the fastest data structure and algorithm f…… -
Java – override spring: message tags with database values
I use spring to display messages in the properties file I want to be able to override the < spring: Message > ta…… -
ANTLR V4, javalexer, and javaparser return null as a parse tree
I am using ANTLR V4 to extract the parse tree of Java programs for other purposes Let me start with this sample: ANTLR…… -
Java – cannot resolve any bean of type [org. GlassFish. Jersey. Message. Filtering. SPI. Objectprovider]
I tried to transfer from Moxy to Jackson JSON media provider to serve my jersey network, and found several problems I …… -
Java – meaning of crossing out breakpoints in eclipse [copy]
See English answers > what different breakpoint icons mean in eclipse? 5 Solution This means that you have chosen t…… -
Java – SSL debugging in eclipse
The following error occurred while running the eclipse application javax.net.ssl.SSLHandshakeException: sun.security.…… -
Java – custom sorting string list (following Chamorro language sorting rules)
I'm trying to sort the string list for the Pacific island language (Chamorro) In this language, Ng is considered a let…… -
Java Swing; How do I make it so that the program starts on the far right side of the screen?
By default, my swing program starts at the top left corner of the display Is there any way to make it pop up on the ri…… -
Java – who will automatically pack / unpack?
Does the compiler or runtime perform automatic boxing / unpacking? Consider the following example: public Integer get(…… -
Java – how to programmatically change the color selected in the check box
I use it in Android Check@R_88_2419 @View I want to change its color when checking Now it is the default dark green. W…… -
In Java, is there any way to read the file when it is locked by another thread?
So I use the following command to create a lock on the file so that I can edit it exclusively: File file = new File(fi…… -
Java – if the value in JSON is null, the default value is provided for the property
Suppose I have a class, that is private class Student { private Integer x = 1000; public Integer getX…… -
The difference between using wildcards in Java and declaring generic types in abstract methods
I tried to understand generic types in Java, which seemed understandable in theory, but I encountered problems when I …… -
Rx-java2 – create custom operators in rxjava2?
It's hard for me to find examples of how to create custom operators using RX Java 2 I have considered several methods:…… -
How can I share Java functionality without providing other source code?
When programming in C language, we have header files and source files When our company sells our products (essentially…… -
Java – why is cloning arrays so slow?
This test for (;;) { int[] a = new int[10]; System.gc(); long t0 = System.currentT…… -
Java – 1e9d divided by what does that mean?
This is a clip: String myTime = someTime / 1e9d + ","; Sometime is using system Derived from nanotime() 1e9d what are …… -
Java – why does this type parameter remain in bytecode?
Type erasure page says However, for the following classes: public class Foo<E extends CharSequence> { public…… -
Java – Sudoku solving method
There is something wrong with my Sudoku solving method The plan works as follows; When the circuit board starts, it is…… -
Comments – how do I discard bindings in Ocaml?
I want to comment the function in the external library as deprecated to ensure that it will not be used in my project …… -
java-8 – Weblogic 12.2. 1 Java 8 Spring Data JPA Hibernate 5. X deployment conflict
I'm trying to use 5.0 with hibernate X and spring data JPA 1.9 Weblogic 12.2.4 1. Deploy ear file In Weblogic 12.1 The…… -
How to unit test Java methods using processbuilder and process?
I have a Java method that starts a process with processbuilder, outputs its output pipeline to a byte array, and then …… -
Java: non heap memory analysis
The problem we have is that our non heap memory has been growing So we have to restart our Jee (java8) – webapp every …… -
Multithreading – operations in a separate TThread block GUI thread
I use this tutorial http://delphi.about.com/od/kbthread/a/thread-gui.htm Creates a class that uses the tdownloadurl to……