Recent questions tagged java

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java - Mockito, @InjectMocks strange behaviour with final fields

I am seeing behaviour that I believe is a bug. @InjectMocks does not seem to create a new test subject before ... getSection()); } } Cheers. 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 portable way to have "SELECT FIRST 10 * FROM T" semantic?

I want to read data in blocks of say 10k records from a database. I found Result limits on wikipedia and ... setMaxRows which I had overlooked. 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 javax.sql.DataSource thread safe?

I am using the PostgreSQL 9.1 JDBC4 driver (postgresql-9.1-902.jdbc4.jar) in a Java EE application deployed ... getConnection() method on 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 - Guice @Provides Methods vs Provider Classes

I'm working on a fairly large project that has a lot of injections. We're currently using a class that implements ... my Module or vice-a-versa? 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 - JAXB: how to unmarshal a List of objects of different types but with common parent?

There is a fairly common pattern in our applications. We configure a configure a set (or list) of objects in ... iterate the elements as above? 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 - stop Spring Scheduled execution if it hangs after some fixed time

I have used Spring Framework's Scheduled to schedule my job to run at every 5 mins using cron. But ... (true); return threadPoolExecutor; } 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 log all active properties of a spring boot application before the beans instantiation?

There is already a question asking for logging the active configuration, there is a correct answer but the ... before the beans instantiation? 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 - Perform custom event before Session Expiry in Spring

I am beginner in Spring framework. In my case Session can be expire by following way --> Success Log-out ... session expiry. Thanks in advance 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 - Converting string to date using java8

I am trying to convert a string to date using java 8 to a certain format. Below is my code. Even after ... ); System.out.println(dateTime); 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 de-serialize a Map<String, Object> with GSON

i am fairly new to GSON and get a JSON response of this format (just an easier example, so the values make ... 3141 Any help is 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 - org.json.simple cannot be resolved

I'm a total java newbie and I have this problem. I try to decode Json and in order to do that I want to ... to make them work? Thanx in advance. 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 use joda time with JPA (eclipselink)?

I tried to use the DataTime in my entity class. Adding @Temporal(TemporalType.DATE) above the field, I got ... suggestion? Thanks for the help. 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 - Convert JSON many objects to single JSON using Jackson

I have JSON, with differents levels field, so I want to convert to a single JSON with fields with one level ... example are prop4 and prop5. 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: automatic rollback on checked exceptions

One way to configure Spring to rollback on a non RuntimeExceptions is using @Transactional(rollbackFor=...) ... exception class in EJB. See Question&Answers more detail:os...

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

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245 views

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java - How to use HttpsURLConnection through proxy by setProperty?

Network environment: Https Client<=============>Proxy Server<==============>Https Server 192.168 ... to be modified to the right configuration. 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 - Connect two client sockets

Let's say Java has two kind of sockets: server sockets "ServerSocket" client sockets or just "Socket" Imagine the ... |middle server| <---User 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 7 - How to change tomcat compiler

I'm trying to use the new Java 7 switch on strings feature. But Tomcat is not cooperating. I've made sure ... . Any tips 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 - How to show Heads up notifications android

How to get a heads up notification.With below code i can only see three dots on status bar and a ... (0, notificationBuilder.build()); 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 - WeakHashMap iteration and garbage collection

I am using a WeaekHashMap to implement a Cache. I am wondering if I am iterating over the keys of ... when WeakHashMap is not synchronized ? 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 request scope bean

How can I set up a bean which will created once per request. I Tried to do like this : @Component @Scope(value ... "ends request"); } } 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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190 views

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java - Error when trying to encode/decode String to Base64

I need to do Base64 encoding from byte array to stirng as opposed to another byte array. But when I decode ... .Base64.decode(Base64.java:246) See Question&Answers more detail:os...

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

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268 views

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java - How to disable main JFrame when open new JFrame

Example now I have a main frame contains jtable display all the customer information, and there was a create ... frame? Something like JDialog. 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 avoid warning for the Base 64?

I have just tried a sample code form net it shows a warning as follows SimpleConvertImage.java:7: warning:com.sun.org. ... ,"snap3.png")); } } See Question&Answers more detail:os...

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

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379 views

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java - Deserializing LocalDateTime with Jackson JSR310 module

I'm using the library described the Jackson Datatype JSR310 page but I'm still having difficulty getting it to work. ... the ISO 8601 format... 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 - Executing a jar on mac 10.8

Although this seems like a rather obvious question, I couldn't find the answer anywhere online. After I create ... these ways solved the issue. See Question&Answers more detail:os...

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

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244 views

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java - How can I display a BufferedImage in a JFrame?

I want to display variations of the same image in the same JFrame, for example display an image in JFrame, then ... scale of the same image. See Question&Answers more detail:os...

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

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106 views

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java - Why does not Hibernate set @DynamicInsert by default

Could anyone explain to me why Hibernate does not set the @DynamicInsert annotation by default and allow entities ... properties by default? See Question&Answers more detail:os...

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

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118 views

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java - how to check from a driver, if mongoDB server is running

I wonder, if there is a way to check if mongoDB server is running from java driver for mongoDB? ... there some more civilized 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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