Recent questions tagged java

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java - Spring Boot enable http requests logging (access logs)

How to enable access logs in an embedded tomcat server provided by spring boot? I've tried this in application. ... .file=/home/mati/mylog.log 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 - Enhanced 'for' loop and lambda expressions

To my understanding, lambda expressions capture values, not the variables. For example, the following is a compile-time ... by a normal loop.** 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 I read the response header from RestTemplate?

I am posting information to a web service using RestTemplate.postForObject. Besides the result string I need the ... request, String.class); 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 - Converting char array into byte array and back again

I'm looking to convert a Java char array to a byte array without creating an intermediate String, as ... the conversion and unconversion work? 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 generate an Eclipse formatter configuration from a checkstyle configuration?

I have a checkstyle configuration XML file and want to automatically generate an Eclipse formatter configuration from this ... that can do this? 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 - PriorityQueue/Heap Update

Does Java have an easy way to reevaluate a heap once the priority of an object in a PriorityQueue has changed? ... running update on the heap. 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 - Code line wrapping - how to handle long lines

I'm facing a particular line that is 153 characters long. Now, I tend to break things after 120 characters ... would simply follow them. Thanks! 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 - getSupportFragmentManager().getFragments() shows a compile time error

Calling getSupportFragmentManager().getFragments() shows a compile time error with the message below: getSupportFragmentManager ... this error. 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 is a FrameLayout used for fragments?

Wherever I look, FrameLayout seems to be used as the FragmentContainer. Why is FrameLayout always seen with Fragments? 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 timeout in Spring WebServiceTemplate

I am using org.springframework.ws.client.core.WebServiceTemplate for making Web Service calls. How can i configure timeout for the call. 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 - When should streams be preferred over traditional loops for best performance? Do streams take advantage of branch-prediction?

I just read about Branch-Prediction and wanted to try how this works with Java 8 Streams. However the ... compared to normal streams)? 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 - JAXB Marshalling with null fields

This is a pretty simple request, but I just didn't find a way to do it. I'm basically trying to set up a ... ></date> </foo> Thanks, Jalpesh. 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 I set -Dfile.encoding within ant's build.xml?

I've got java source files with iso-8859-1 encoding. When I run ant, I get "warning: unmappable character for ... I'm trying to avoid that. 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 - Setting foreground color for HSSFCellStyle is always coming out black

I am using POI to create an Excel spreadsheet in Java. I have the following code used for creating a header row: ... no color shows up at all. 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's the difference between the IN and MEMBER OF JPQL operators?

What's the difference between the IN and MEMBER OF JPQL operators? 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 - Mock private static final field using mockito or Jmockit

I am using private static final LOGGER field in my class and I want LOGGER.isInfoEnabled() method to return ... use Powermockito. Please help. See Question&Answers more detail:os...

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

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609 views

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java - Get value from hashmap based on key to JSTL

I want to get the value of HashMap based on key. HashMap<String, ArrayList<String>> map = new HashMap<String, ... is really that kind of key. 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 - When to use DiscriminatorValue annotation in hibernate

What and when is the best scenario to use DiscriminatorValue annotation in hibernate? See Question&Answers more detail:os...

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

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353 views

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java - Does assertEquals(Object o1, Object o2) uses the equals method

In other words, does assertEquals works with a class that overrides equals 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 - Android Studio - supplied javaHome is not a valid folder

I decided to update my JDK to Java 8, and installed to the default location of C:Program FilesJavajdk1.8.0 with ... how can I change it? Thanks 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 does the compiler prefer an int overload to a varargs char overload for a char?

Code public class TestOverload { public TestOverload(int i){System.out.println("Int");} public TestOverload(char... c) ... : I am using Java 8 See Question&Answers more detail:os...

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

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620 views

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java - Spring Rest POST Json RequestBody Content type not supported

When I try to post new object with post method. RequestBody could not recognize contentType. Spring is already ... requestbody object. It works. 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 8 - How to convert from Instant to LocalDate

I have an Instant coming from a source that should, according to the spec, be a LocalDate, but don't see any ... is the best way to do this? See Question&Answers more detail:os...

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

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346 views

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java - Android View performClick() and callOnClick() difference

What is the difference in usage between performClick() and callOnClick()? It seems that they work the same way, ... does View have two methods? 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 - Convert List<String> to List<Integer> directly

After parsing my file " s" contains AttributeGet:1,16,10106,10111 So I need to get all the numbers after colon in the ... )[1].split(",")); } 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 convert an Optional<T> into a Stream<T>?

I want to prepend a stream with an Optional. Since Stream.concat can only concatinate Streams I have this question: ... stream(); // not working See Question&Answers more detail:os...

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

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885 views

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java - Why is assertEquals(double,double) deprecated in JUnit?

I was wondering why assertEquals(double, double) is deprecated. I used import static org.junit.Assert.assertEquals; ... What could be wrong? See Question&Answers more detail:os...

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

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349 views

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java me - AES Encryption/Decryption with Bouncycastle Example in J2ME

i want to Encrypt and Decrypt data in J2ME using AES Algorithm with bouncy castle can any one give me ... with PKCS5Padding 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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