Java
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Java – loads drools / KIE workbench artifacts directly from the repository
We tried to switch to drools 6.0 using a new KIE workbench (formerly known as guvnor) and a new Maven based artifact N…… -
Because Java io. NotSerializableException：org. apache. spark. Sparkcontext, spark job failed
When I try to apply method (computedwt) on RDD [(int, arraybuffer [(int, double)])] input, I face an exception input:s…… -
Java – subtract the smallest number from several numbers
I have two numbers I want to subtract the lower number from the two values x: 1000 y: 200 => result: x = 800 and y …… -
Java – quicksort partitioning algorithm
I'm trying to write a quick sort algorithm using the cormen algorithm textbook Here is my code class Quicksort { p…… -
Java 8: intstream to integer []
I'm writing a simple program that will eventually plot the runtime of various sorting algorithms written in Java The g…… -
Java – simple if statement and normal if statement
At the Java bytecode level, is there any difference between a simple if statement (example 1) and a normal if statemen…… -
JavaFX – disable row selection in tableview
I have a read-only tableview in JavaFX 8. I don't want the user to select rows Solution After a while, I found out how…… -
Java – replace decimals 1 to 10 with names (“one”, “two”.)
I try to take a string and then return a string of numbers 1 to 10 and replace it with the words of these numbers For …… -
Java – sum of elements in the array
I'm doing a simple task for a summer java course. I just hope you can look at my code and see if the way I do it is th…… -
Java – Weblogic increases memory
How to increase the memory used by Weblogic (Java) When starting the server from eclipse, it displays a message, that …… -
Java – how do I save a file from a Jersey response?
I tried to download swf files from web resources using Jersey I wrote the following code, but I couldn't save the file…… -
Java – why can’t I add the first header to getpreferencescreen?
The standard setting activity from Google Android studio now displays the first title "general" So I modified the code…… -
Java – how to use reflection to tell a method to have a varargs parameter?
This is a sample code package org.example; import java.lang.reflect.Method; class TestRef { public void tes…… -
How to detect the submit button clicked in multiple submit button scenarios in a single action class?
I have a form in JSP There are two submit buttons: search and add new <s:form name="searchForm" action="employeeAct…… -
java. net. Socketexception: network unreachable connection
I tried to download an XML text file from a web server using this method: static void download (String url,String file…… -
Verify java version compatibility
I have a jar file compiled with JDK 1.7. I want to check whether the Java runtime environment of my jar is 1.7 or upda…… -
Used to represent a number as string, integer All possible characters of Java
In integer In Java, there are the following codes: /** * All possible chars for representing a number as a String */…… -
Java – SSL configuration in Tomcat and APR
I encountered a problem setting my Tomcat using APR native lib, Tomcat: 7.0.42 Java: 1.7.0_40-b43 OS: Centos 6.4 (2.6.…… -
Java – number of elements in ArrayList
How much data can a list can hold at the maximum? 8 Solution ArrayList cannot hold more than integer MAX_ Value is an …… -
Java – NullPointerException reflected when robolectric starts – any hint?
I'm developing an Android project on eclipse and I'm trying to switch from running tests on the simulator / device (ve…… -
Java – is there any way to extract the primary key (or ROWID) using namedparameterjdbctemplate and generatedkeyholder?
I tried to extract ROWID or primary key using spring's namedparameterjdbctemplate and generatedkeyholder I want to do …… -
Java – basic machine learning
I am a novice in machine learning... I am developing a tool in which I need to predict the value of variables accordin…… -
Java – how to use the current date as the input of the function to get the month name
How to create a function to get the current date and return the month name? For example, string MonthName ("September …… -
Is there a Java enum in European countries and languages?
Are there any Java (> 5) enumerations for listing European countries and languages somewhere? But if I can avoid th…… -
Java – what is the difference between jaxp, JDOM, Dom4j and Xerces?
What's the difference between them? It is said that jaxp is just an API specification, which is implemented by JDOM an…… -
Java – can sockets accessed in different programming languages communicate?
Is the socket programming language independent? Can I keep the server written in Java and the client written in C? Sol…… -
Java – the program continues to run despite the interruptedexception
I started learning Java, and now I'm in the concurrency chapter After reading something about concurrency, I tried my …… -
Java – (simple) dateformat, allowing 24:00:00 and 00:00:00 as input
I've been looking for this, but I haven't succeeded so far Do you know if there is a "dateformat" ish class, which wil…… -
2D array problem Java
If I have a 2D array arr [rows] [columns], how can I find the size of rows and columns respectively with arr.length? S…… -
Java – unconditionally execute tasks in ant?
I'm trying to define the task of sending (using echo) messages when the target completes execution, whether the target…… -
Java – sample programs are required to throw interruptedexception
I'm going through Chapter 9 (threads) of Kathy Sierra scjp 1.5, which is mentioned: I just need a sample program to kn…… -
Java – you can specify an integer value for char, but you cannot assign an integer variable to char
Why not compile the following code int n = 5; char c = n; But the following compilation char c = 5; In both cases, don……