Recent questions tagged java

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java - How can I recieive confirmation for delivered email with JavaMail API?

I'm writing a program, that sends email messages and want to know when the receiver receives ... .setNotifyOptions(SMTPMessage.NOTIFY_SUCCESS); 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 make JTextPane autoscroll only when scroll bar is at bottom and scroll lock is off?

How to make JTextPane autoscroll only when scroll bar is at bottom and scroll lock is off? This shouldn't have ... finding all over Google. :( 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 can you package an executable jar with a portable JRE?

I want to be able to distribute by executable JAR without having to make the user upgrade to the latest ... JRE installed on their system? 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 do we convert a String from PEM to DER format

Have a String being sent from in the below format: -----BEGIN RSA PUBLIC KEY----- ... openSSL PEM_write_bio_RSAPublicKey(bio, rsa); 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 catch all exception in netty

As far as I know netty handle exceptions by override method exceptionCaught(). But what I want is a Handler ... looks ugly. any better idea? 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 - For a large validation task is chain of responsibility pattern a good bet?

I need to build a process which will validate a record against ~200 validation rules. A record can be one of ... there a better design pattern? 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 - Does calling Thread.interrupt() before a Thread.join() cause the join() to throw an InterruptedException immediately?

Basically, what the question title says. Thread t = new Thread(someRunnable); t.start(); t.interrupt(); t. ... before doing its "wait" routine? 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 - accessing wsdl on Tomcat

I have a web service and I was deploying it on GlassFish. I accessed its wsdl through http://localhost:10697/ ... ... Thanks a lot! Regards 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 - H2 - How to create a database trigger that log a row change to another table?

How to create a database trigger that log a row change to another table in H2? In MySQL, this can be done easily: ... `field2`, ... ) ; END; 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 - Spring Data JPA - How to programmatically set JpaRepository base packages

When defining an EntityManager in a Spring Java Config class, I can add the base packages to scan for Entity classes ... to be done this way? 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 - Android Splash Screen

this is what i have in my package explorer so lets start from the top and work our way around to the problem ... info if it will be faster. 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 - Hibernate_sequence table is generated

I have id column with generated strategy AUTO, I'm wondering, why MySql generate hibernate_sequence table? I supposed ... version is 5.6.12 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 - Export JPanel Graphics to .png or .gif or .jpg

I'm trying to develop some sort of paint using Java. I have a JComponent that is located inside of a JPanel. I ... ));}catch (Exception e) {} 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 a view of a collection?

I've been reading the term view a few times when using Guava collections and reading its documentation. I've looked ... if there is one? 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 - possible to force a 64-bit JVM to use 32-bit mode via the argument "-d32"?

so I have some 3rd party native library that works only in 32 bit JVM across windows,osx,linux and I need ... java application in 32 bit mode? 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 - Uploading file as stream in play framework 2.0

I'm writing a play 2.0 java application that allows users to upload files. Those files are stored on a ... directly to another system ? 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 - How to shutdown Derby in-memory database Properly

I'm using derby as an embedded database. Furthermore, I'm using it's in-memory database option for my unit ... WwdEmbedded Program (Java 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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java - Android Countdown Timer to Date

I am trying to make a countdown timer for a game/date in android. I want to create a timer that displays the ... about how I could code 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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java - Hadoop: Cannot use Jps command

The problem is hduser@saket-K53SM:/usr/local/hadoop$ jps The program 'jps' can be found in the following ... help would be appreciated.. 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 - Garbage collection vs. non garbage collection programming languages

So if I understand well, Garbage collection automatically deallocates objects that are not used by the program ... of a garbage collector? 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 are singletons handled in a web application?

From what I understand, a singleton is basically when you have a private member that represents the object you ... ) until tomcat is shutdown? 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 - Can I use MyBatis to generate Dynamic SQL without executing it?

I have some complex queries to build with a number of optional filters, for which MyBatis seems like an ideal ... possible? If so, how? 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 make Spring's @ComponentScan search components in included JARs

I made a jar with Spring components to include in multiple projects (core.jar). I created a new Spring ... search components in included JARs ? 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 do mouse hover using Selenium WebDriver in Firefox 19?

I have used selenium 2.31. I have used Actions class for mouse movement. Using this I moved the mouse over a ... Is there any solution for 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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java - ImageIO.read illegal argument exception - raster bands/colour space components?

Apologies for the somewhat vague title, I can't work out what the keywords are here. The setup's quite simple, I'm ... in case it's of any use: 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 - Is there a good way to use maven to run an executable jar?

I have a multimodule maven project, and one of the modules is for distribution. Project | moduleA | moduleB | . ... for long periods of time. 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 measure file read speed without caching?

My java program spends most time by reading some files and I want to optimize it, e.g., by using concurrency, ... sure it's a good idea. 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 create method for age calculation method in android

I want to write a method to calculate the age from the birth date, is the logic correct and how to write it in ... - 1;} } return age; } See Question&Answers more detail:os...

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

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