Recent questions tagged java

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java - Secure FTP with org.apache.commons.net.ftp.FTPClient

Is there a way I can implement a secure FTP with org.apache.commons.net.ftp.FTPClient? If not, what are other options for Java? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Partition a Stream by a discriminator function

One of the missing features in the Streams API is the "partition by" transformation, for example as ... the provided groupingBy collector. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Flexible CountDownLatch?

I have encountered a problem twice now whereby a producer thread produces N work items, submits them to an ... own"? Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - bouncycastle + JBoss AS7: JCE cannot authenticate the provider BC

I use BouncyCastle for encryption in my application. When I run it standalone, everything works fine. However, if I ... how could I deploy it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What is difference between @Entity and @Embeddable

The difference between @Entity and @Embeddable annotation when each one is added before class declaration? the first ... union of two tables See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to package an Apache CXF application into a monolithic JAR with the Maven "shade" plugin

I am writing a console-based Java application, intended to be run by cron in a batch-processing ... 10:44:02 AM org.springframework.beans.factory.support.DefaultListableBeanFacto...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - When should I use a Hashtable versus a HashMap

This is not a question about the differences between Hashtable and HashMap. I understand that a Hashtable object ... instead of a HashMap. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Get Thread By Name

I have a multithreaded application and I assign a unique name to each thread through setName() property. ... to incorporate that functionality? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to set a transparent background of JPanel?

Can JPanels background be set to transparent? My frame is has two JPanels: Image Panel and Feature Panel. ... have a transparent background? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - ViewHolder pattern correctly implemented in custom CursorAdapter?

Here is my custom CursorAdapter: public class TasksAdapter extends CursorAdapter implements Filterable { private final ... point them out. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JUnit tests always rollback the transactions

I'm running a simple JUnit test agains an application DAO. The problem is that I always get: javax.persistence ... always sets rollback to true? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Maven and eclipse: a reliable way to add non-Maven or external jars to a project?

Maven is great. It mostly keeps me out of jar dependency hell by specifying versions of dependent packages in ... </plugins> </pluginManagement> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - get json from HttpResponse

HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("http://my.server:8080/android/ ... php:s json_encode() See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Does jmap force garbage collection when the live option is used?

I've been experimenting with jmap -histo and jmap -dump today When run in this sequence jmap -dump: ... find the current behavior documented? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Configure Jackson to deserialize single quoted (invalid) JSON

I am a newbie to using jackson library. I am trying to do this [see below], and it is throwing error. String ... quote(') with double quote("). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Interpreting eclipse .classpath file. What does 'kind="con"' and 'exported="true"' mean?

This is the eclipse .classpath file of the eclipse plugin program that I downloaded. I think that kind="src" and ... some of them are exported. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do you decide what byte[] size to use for InputStream.read()?

When reading from InputStreams, how do you decide what size to use for the byte[]? int nRead; byte[] data ... to find a clear answer elsewhere. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I get the last/end offset of a kafka topic partition?

I'm writing a kafka consumer using Java. I want to keep the real time of the message, so if there are ... do new consumer has this function? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why Thread.sleep is bad to use

Apologies for this repeated question but I haven't found any satisfactory answers yet. Most of the question ... a-poorly-designed-program.aspx See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - CXF: No message body writer found for class - automatically mapping non-simple resources

I am using the CXF rest client which works well for simple data types (eg: Strings, ints). However, when I ... hope this will get attended to. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to get number of days between two calendar instance?

I want to find the difference between two Calendar objects in number of days if there is date change like ... is month difference its worthless. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Iterating over the content of a text file line by line - is there a best practice? (vs. PMD's AssignmentInOperand)

We have a Java Application that has a few modules that know to read text files. They do it quite simply with a ... line = br.readLine() code?) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - spring-boot default log location

In a spring-boot application I can specify a custom log file with java -jar spring-boot-app.jar --logging.file=/ ... with port(s): 8100 (http) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - List assets in a subdirectory using AssetManager.list

My application has an assets directory in which I've dumped a bunch of text files I need to load at runtime. ... for that list() parameter is? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to add multiple application.properties files in spring-boot?

I have a Spring boot application that is divided in several modules. The main module runs the application and ... file everything works fine. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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146 views

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java - How to check if a given Regex is valid?

I have a little program allowing users to type-in some regular expressions. afterwards I like to check if this ... you give me some advice? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Resetting Standard output Stream

I know that there is a function in Java to set Standard Output Stream to any user defined value using System. ... one which is standard output? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Write Base64-encoded image to file

How to write a Base64-encoded image to file? I have encoded an image to a string using Base64. First, ... string representation of the image. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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