Java
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Java – how to handle thousands of quartz queries gracefully?
We have a required application >Reprocess large amounts of data at night, and > reprocess large amounts of data …… -
How to use Java driver to execute full-text search commands in mongodb?
Mongo and Java masters Our team decided to use the full-text search API recently introduced in mongodb However, we fin…… -
Java – how Web services work
I am new to web services. I want to use java to implement web services in my eclipse project So anyone can tell me how…… -
java – Hadoop Map Reduce For Google web graph
We have given the task of creating a map reduce function as a task. This function will output the nodes you can start …… -
Java – Oracle jdbc driver statement cache and bonecp statement cache?
I am using the Oracle jdbc driver and evaluating bonecp I asked myself if I should use one or another for statement ca…… -
Create variable names using loops in Java?
The first poster, long time readers, so be gentle to me:) Refer to the following code, which is used to generate time …… -
Java – when to @ requestparam and @ pathvariable
Just want to know in which case we should select @ requestparam and @ pathvariable I Know: >@ requestparam takes th…… -
Java – round to 2 decimal places
(Math.round(doubleValue*100))/100.0 (Math.round(doubleValue*100))/100.0 Is there a better way to round the decimal to …… -
Java – what is imageobserver?
When you draw an image, you need an image observer New comments new new new flag new new new flag new new flag new fla…… -
Java – Lucene index problem with “–” character
I came across a Lucene index that indexes words with "–" characters It applies to some words that contain "–" but not …… -
JPA: what is the behavior of merging with lazy initialization sets?
The following is the sequence that caused the problem: >I have a team record and 3 player records in the database T…… -
Java – sort double values in JTable
I found many problems related to this, but I didn't find a simple way to solve my problem I can't find a way to make m…… -
Threshold image using OpenCV (Java)
I'm working on a project with OpenCV I need to convert the following image to a threshold image I tried this function:…… -
Operator – rxjava returns the subscribed value in the function
For some reason, I sometimes want to use RX operators instead of the normal Java way to convert data structures, becau…… -
Bison java example
Does anyone know if there are some tutorials and / or examples of using GNU bison and java online I searched the Inter…… -
Java – Android WebView cookie returns null
I want to set and retrieve a cookie in WebView in Android I've tried many cookie manager scripts to try to make it wor…… -
Java – locationclient getlastlocation() returns null
I'm new to Android programming and want to start by creating a very basic application that displays the latitude and l…… -
Multithreading – how to update GUI from thread using Delphi
I am using Delphi anonymous thread to execute code If I do this from within the thread, changes will occur, but once t…… -
Java – when to create an Enum instance?
I have a simple question about enumeration in Java. Please refer to the following code When to instantiate propname Co…… -
In Java, how to define the endian of the data being written when using dataoutputstream to write a file?
I am using dataoutputstream to write to the file, but I want to change the endian of the data This is how I write byte…… -
Java – replace substrings of matching regular expressions
I get some HTML and do some string manipulation and use similar strings string sample = "\n \n 2 \n \n \ndl…… -
java. util. zip. Zipexception: duplicate entry: Android / support / V7 / graphics / drawable / drawableutils class
I just changed the support library from 23.0 0 updated to 23.1 0, now when I build the project, I receive this error: …… -
Java – a method to speed up full count sorting
I had a problem at hackerrank Due to timeout, my first attempt passed all test cases except the last one After failing…… -
Java – my autoclosable Can the close () implementation detect potential exceptions?
When implementing autocolosable to use the Java 7 try with resources statement, I want to know if there are exceptions…… -
Java – class #getdeclaredmethods () returns inherited methods
See English answers > getdeclaraedmethods() being differently in Java 7 vs. Java 81 interface A { A setX(Object…… -
Java – how to parse / decompress / decompress Maven repository indexes generated by nexus
I've been from http://mirrors.ibiblio.org/pub/mirrors/maven2/dot-index/nexus-maven-repository-index.gz Downloaded the …… -
java-8 – java. time. format. Datetimeparseexception: cannot parse text at index 3
I use Java 8 to parse the date and find the difference between the two dates This is my clip: String date1 ="01-JAN-20…… -
Java – copy excel tables using Apache poi
How do I use Java Se and Apache POI to copy an entire excel table into another excel table in the same workbook? Solut…… -
Java – why do I get a non convertible type error?
If I use this class: public class BooleanTest { public static void main(String args[]) { final Object[] ob…… -
Java static members in subclasses accessed through generic parent classes
This seems like a new problem, but the last time I use Java, the language has no generics I have a class hierarchy (ch…… -
Java – how to draw images to JPanel or JFrame?
I have read the Oracle tutorial on how to draw images to JPanel or JFrame, but I can't seem to do it correctly I need …… -
Java – is there any reason why some methods in file use Boolean values to indicate its success (not just throwing exceptions)?
The file class in java contains methods that use Boolean values to indicate the success of the operation being perform……