Java
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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 – why is it faster to iterate buckets in linked HashMap than HashMap?
It's hard for me to understand that Google search, I found and If this is the case, why does the only HashMap have to …… -
Indexof() has a strange Java. String with a duplicate string util. List behavior
I've just encountered some strange behavior. I don't expect from ArrayList < string > in Java Of course, this is…… -
Java – Solr filter cache (fastlrucache) occupies too much memory and leads to insufficient memory?
I have a Solr setting One master server and two slave servers are used for replication We have about 70 million docume…… -
Java – the transient final field used as a lock is null
The following code throws a NullPointerException import java.io.*; public class NullFinalTest { public static voi…… -
Is there something similar to the spring @ transactional annotation available in Java EE 6?
In my company, I do not encourage the use of spring framework, but promote Java EE 6 But recently I read about the spr…… -
Best practices for Java exception handling
I recently wrote the following code; It uses a lot of exception handling I think it makes the code look very difficult…… -
Java – cannot set the request character encoding to UTF-8 from the context
See English answers > Unicode input retrieved via primefaces input components become corrupt 1 <?xml version='1.…… -
Java – why doesn’t my operation work when I use BigDecimal?
I'm trying to operate with BigDecimal, but it always returns 0 Why does double work when I use it? public static void …… -
Java – the target fragment declared by the fragment does not belong to this fragmentmanager
I did an activity a, in which there is a fragment X. through fragment x, edit and click the text item on the event. I …… -
Java – Kerberos for thrift?
I have a simple java application based on thrift This is very simple, just using thrift's "Hello world" message transm…… -
Java – psqlexception: error: syntax error at or near
I think JPA is a direct relationship It looks like this CompanyGroup： @Entity @Table public class CompanyGroup implem…… -
Java – how to print SOAP message content when using Apache axis
I am using Apache axis for web service automation I am preparing the soap request through axis and further accessing t…… -
Java – how to iterate over lists such as list >
I have a method to return list < map < string, Object > > How to iterate like list < map < string, O…… -
Is there any way to focus on JavaFX?
I know you can execute node Requestfocus() to focus on nodes in JavaFX But is there any way to remove focus from nodes…… -
Java generics
I want to implement a method that takes object as a parameter, converts it to any type, and returns NULL if it fails T…… -
Java – should a class implement an interface with only constants?
Today, I looked at the zipentry class and found the following: public class ZipEntry implements ZipConstants,Cloneable……