Recent questions tagged JAVA

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java - JOptionPane YES/No Options Confirm Dialog Box Issue

I've created a JOptionPane and it only has two buttons YES_NO_OPTION . After JOptionPane.showConfirmDialog pops out , I ... Exception ex) { } } 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 - Where does the slf4j log file get saved?

I have the followed imports: import org.slf4j.Logger; import org.slf4j.LoggerFactory; and the following instantiation: ... to fix the problem. 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 - Excluding tests from being run in IntellIJ

Is it no option to exclude some tests in IntelliJ IDEA Ultimate? I want to run unit tests in IntelliJ but ... seperatly from the unit tests. 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 - Check instanceof in stream

I have the following expression: scheduleIntervalContainers.stream() .filter(sic -> ((ScheduleIntervalContainer) sic). ... before the filter? 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 does BufferedInputStream copy a field to a local variable rather than use the field directly

When I read the source code from java.io.BufferedInputStream.getInIfOpen(), I am confused about why it wrote ... give a reasonable explanation? 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 - Method org.postgresql.jdbc.PgConnection.createClob() is not yet implemented

How can I solve this error: java.lang.reflect.InvocationTargetException: null at sun.reflect.NativeMethodAccessorImpl ... common frames omitted 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 - Re-run Spring Boot Configuration Annotation Processor to update generated metadata

I've added: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor ... not have instructions. 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 - Checking that a List is not empty in Hamcrest

I was wondering if anyone knew of a way to check if a List is empty using assertThat() and Matchers? Best way ... way to do this in Hamcrest. 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 access "Activity.this" in Kotlin?

I have this piece of Java code: MaterialDialog builder = new MaterialDialog.Builder(MainActivity.this) I want ... breaks at MainActivity.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 - photo/image-to-sketch algorithm

Does anyone have an idea, link, library, source code, ... on how to convert photo's and images (bitmaps) to ... JPEG photo's to sketchy images. 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 Edit Bitmap Channels

It's possible to access the alpha channel of a given bitmap with extractAlpha(), but I haven't been able ... into a Bitmap with Android? 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 call fragment method from main activity

I have method in fragment class. I want to call that method from main activity but I don't want to ... using FragmentById (or) FragmentByTag? 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 Integration Test is Slow with Autowiring

I am trying to speed up the Integration tests in our environment. All our classes are autowired. In our ... would end up including everything) 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 - EclipseLinkJpaVendorAdapter instead of HibernateJpaVendorAdapter issue

using an application which consist of JSF, Spring and Hibernate. My example runs normally, then ... without LoadTimeWeaver specified 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 - Private Methods Over Public Methods

I was examining the StringTokenizer.java class and there were a few questions that came to mind. I noticed ... first sample more beneficial? 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 - Singleton and Exception

Whats the best way to design a singleton class that could throw an exception? Here I have a Singleton (using ... getInstance(); } Thanks again. 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 i know which default settings are enabled for Sun JVM?

i want to try CompressedOops on my JVM. No I wonder if it might be enabled by default. I run this ... with their default values? regards Janning 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 properly convert domain entities to DTOs while considering scalability & testability

I have read several articles and Stackoverflow posts for converting domain objects to DTOs and tried them out in ... project? 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 - "unable to find valid certification path to requested target", but browser says it's OK

I'm developing a Java application that connects to SOAP services exposed at https://ut.eurodw.eu/ (test ... use my own Tomcat installation. 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 - Javascript Callback function pass to Android

I have a javascript interface implemented in Java that is called by my javascript code that is loaded in the webview. ... best way to do 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 - Trim string field in JPA

I have a db table with column of datatype char(20). I'm not allowed to change it to a varchar. I'm ... offering no help on this. Any ideas? See Question&Answers more detail:os...

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

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300 views

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java - MyBatis, how to get the auto generated key of an insert? [MySql]

how can I get the generated key of an insert with MyBatis? I read many pages about this question but I'm ... key of this insert? 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 - Spring Web MVC: Use same request mapping for request parameter and path variable

Is there a way to express that my Spring Web MVC controller method should be matched either by a request ... discussion inside Javi's answer. 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 are GC roots for classes?

In Java, there are special objects called Garbage Collection Roots (GC roots). They serve as a root objects for ... GC roots for the classes? 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 it a bad idea to declare a final static method?

I understand that in this code: class Foo { public static void method() { System.out.println("in Foo"); } ... behaviour of using final is..) 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 WTP: How do I enable SSL on Tomcat?

Eclipse WTP creates its own server.xml file which it places in some folder which configures the tomcat instance you ... " sslProtocol="TLS" /> See Question&Answers more detail:os...

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

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333 views

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java - How to check heap usage of a running JVM from the command line?

Can I check heap usage of a running JVM from the commandline, I mean the actual usage rather than the ... running in Jetty Application server 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 the StringBuilder chaining pattern sb.append(x).append(y) faster than regular sb.append(x); sb.append(y)?

I have a microbenchmark that shows very strange results: @BenchmarkMode(Mode.Throughput) @Fork(1) @State(Scope.Thread) ... how that is possible? See Question&Answers more detail:os...

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

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