Recent questions tagged JAVA

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java - Hibernate Native SQL Query retrieving entities and collections

This is my situation, I have two basic POJO's which I've given a simple hibernate mapping : Person - PersonId ... what I want using this method? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Analyze GC logs for Sun Hotspots, JVM 6

I'm trying to analyze GC behaviour for our application (running in Tomcat, under Sun's Hotspots, JVM 1.6). So ... the specific JVM I'm using? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Set android alarm clock programmatically

I'm trying to build a personal app that will set alarms in the DeskClock app. I can get it to set alarms for ... , true); startActivity(i); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Eclipse 3.5 Unable to install plugins

I really don't know what's going on with Eclipse 3.5 (3.5.0 or 3.5.1, same issues), but it ... -Dhttp.nonProxyHosts=localhost|127.0.0.1 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Maven Settings for multiple repositories

I have the following in settings.xml <mirrors> <mirror> <id>paid-jars</id> <name>jars with license</name> ... /profile> </profiles> </settings> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to search for a string in an arraylist

I want to search for a string in an arraylist. My ArrayList contains: ArrayList <String> list = new ArrayList(); ... ". How can I implement it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to find out what algorithm [ encryption ] are supported by my JVM?

I am using Jasypt for encryption. This is my code: public class Encryptor { private final static StandardPBEStringEncryptor ... my JVM. Thanks, See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Fastest way to tell if a string is a valid date

I am supporting a common library at work that performs many checks of a given string to see if it is a ... was my original questions. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Understanding getInputStream and getOutputStream

Here is a code import java.io.*; import java.net.*; public class Whois { public static void main(String[] ... send "google.com" to outputStream? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to stream large Files using JAXB Marshaller?

The Problem I'm facing is how to marshall a large list of objects into a single XML File, so large I can ... give much hints for that use case. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What is conf/web.xml used for in Tomcat as oppsed to the one in WEB-INF?

My Tomcat deployment has a web.xml file under the conf folder. What is conf/web.xml used for in Tomcat as opposed to ... WEB-INF? Do I need it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Exception Handling Question

I have a question regarding exception handling. Consider following Java code snippet. try{ //code }catch( ... disadvantages of second approach? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - implicit super constructor object() is undefined. must explicitly invoke another constructor

Is this a new bug? I got a new mac computer and install eclipse on it. The checksum matches fine. But ... execution environment to javaSE-1.7 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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541 views

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java - log4j.properties file - multiple loggers in same class

I would like to have two different log4j loggers in my application, and for there to be no "overlap" between the ... =%d %-5p %c - %m%n See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - httpclient exception "org.apache.http.conn.ConnectionPoolTimeoutException: Timeout waiting for connection"

I am trying to send request to my server, with following code. it failed at 3rd request, always. ... HttpClientTest.main(HttpClientTest.java:88) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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351 views

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java - javadoc: @version and @since

Is there a reason to include both @version and @since as part of a class? They seem to be mutually exclusive. ... /use them? @version %I%, %G% See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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242 views

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java - Get all fields (even private and inherited) from class

I am making university project. I need to get all fields from class. Even private and inherited. I tried to get all ... (); } // rest of code See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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441 views

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java - difference between natural ordering and total ordering

I happen to come across many statements like comparable is used when natural ordering is required while sorting an array ... a good example :) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - LocalDateTime remove the milliseconds

I am working in java application where i am using the Java 8. I have integrated the database(multiple database ... know any solution on this. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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260 views

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java - IntelliJ IDEA 12 code completion without capitalisation

In eclipse 4.2, I can just type: joptionpane and press CTRL+SPACE and it will turn into: JOptionPane Is ... code completion (their opinions). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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298 views

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java - Making sure JAVA_HOME is correctly set

Pretty new to Java and also to Mac ... I want to make sure JAVA_HOME is set so in other programs I can use ... what is going on in here? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Using <mvc:resources .../> in spring 3 causes all other views to stop working

Simplest example: I have a dispatcher servlet configured to catch everything: <servlet-mapping> <servlet-name>dispatcher</ ... and eat it too? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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445 views

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java - How to roll back migrations using Flyway?

MyBatis migrations splits each SQL file into two sections: One for migrating forward one version One for ... back versions using Flyway? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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269 views

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java - Clearing a string buffer/builder after loop

How do you clear the string buffer in Java after a loop so the next iteration uses a clear string buffer? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why is a static method considered a method?

I'm writing an explanation for some code for a course, and have been accidentally using the words method and ... Can anybody clear this up? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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546 views

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java - How to generate HMAC-SHA1 in C#?

I am trying to make use of a REST API using C#. The API creator has provided sample libraries in PHP, Ruby and Java ... ("-", "").ToLower(); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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452 views

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java - RegEx backreferences in IntelliJ

I want to use IntelliJ's find-and-replace feature to perform the following transformation: // Replace this model. ... that doesn't work either. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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160 views

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java - When should I use ConcurrentSkipListMap?

In Java, ConcurrentHashMap is there for better multithreading solution. Then when should I use ConcurrentSkipListMap? Is ... two are common? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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