Recent questions tagged Java

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java - Where is the new Object of String created when we concat using + operator

I know this might be quite basic and probably pretty straight forward but i cannot clearly understand what will ... using the new keyword? 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 - Threads stuck at 100% CPU utilization in HashMap during JSF saveState()

We have an issue in our production environment, 4 Threads is at 100% CPU Usage from the HTOP command. To further ... .3 final, JSF 1.2. 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 - JSF: when disable component, its value does not make into the request map parameter. Is there a workaround?

I have a drop down list p:selectonemenu and a checkbox p:selectbooleancheckbox, when I select the checkbox, I ... obtain form attribute value. 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 - Static variables restriction in session beans

It's impossible to use static variables on a session bean code. Is this restriction arbitrary or fundamented? And why? Best 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 - do-while and while comparison

do-while: do { i++; ++j; System.out.println( i * j ); } while ((i < 10) && (j*j != 25)); I am ... ++j; System.out.println( i * j ); } 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 - Making maven copy additional files inside the build jar (not resources but any file inside any package)?

I have a package org.myapp.mypackage with some ruby files (*.rb) and I need to include them in the generated ... , but thanks for suggesting. :) 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 - StringTemplate list of attributes defined for a given template

I am getting started with StringTemplate 4 and I am trying to create a template from a simple string stored in a ... there any way around 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 - Is my analysis of space complexity correct?

This is problem 9.5 from Cracking the Coding Interview 5th edition The Problem: Write a method to compute ... of space complexity correct? 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 - select from two tables using JPQL

I'm using JPQL to retrieve data. I can get data using the statement List persons = null; persons = em. ... and get the firstname and albumname? 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 - Linking JSF inputText with backing bean's field without showing its value

I have backing bean like this: @ManagedBean @SessionScoped public class TestBean { private String testString; public ... keep this value. See Question&Answers more detail:os...

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

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462 views

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java - Spring-Boot Not Finding JSP Pages in WAR File

When running a spring-boot project (java -jar /path/to/war.war) .jsp files are not found. Methods ... 'd certainly appreciate the input! 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 MongoDB - Annotation @CreatedDate does not work while using with custom Id field

I have a simple Persistable Class: public class Profile implements Persistable<String>{ @Id private String username; ... not change anything. See Question&Answers more detail:os...

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

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232 views

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java - Performance comparison of array of arrays vs multidimensional arrays

When I was using C++ in college, I was told to use multidimensional arrays (hereby MDA) whenever possible, since it ... (... new int[N])? 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 - Hive, how do I retrieve all the database's tables columns

I want to write the equivalent of this sql request in Hive : select * from information_schema.columns where ... in the same request? 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 - Using JAXB to unmarshall elements with varying/dynamic names

I'm parsing an XML document that has nodes like the following: <objects> <dog> <data1>...</data1> <data2>. ... use <object type="dog"> elements? 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 - Maven - missing artifact

I've just moved my project from windows to linux ubuntu. After pulling files from repository it turned out that ... these repeats for few cases. 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 - JLayer - Pause and resume song

I've noticed that a lot of topics were about pausing/resuming an MP3 using JLayer, so in order to help ... modifications, due to its simplicity. See Question&Answers more detail:os...

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

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351 views

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java - Override Jackson Object Mapper properties on Websphere 8.5.5 using Apache Wink

We are using IBM(s) bundled Apache Wink to offer JAXRS endpoints for our application. We are coding towards ... hints or tips? Many 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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320 views

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java - Selenium automatically accepting alerts

Does anyone know how to disable this? Or how to get the text from alerts that have been automatically accepted? ... FF 20 with Selenium 2.32 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 - Draw a rectangle in a PDF document using iText

Is there a way in iText to draw a rectangle in a PDF document? See Question&Answers more detail:os...

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

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223 views

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java - Regular expressions in J2ME

If I wanted to implement a regex engine in JavaME (Which lacks the regex libraries), where would be the best ... a regular expression would do. See Question&Answers more detail:os...

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

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252 views

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java - Android Rotatable ImageView

I am trying to create a Rotatable an ImageView to which I will specify certain angle and pivot point and see it rotated ... How do I do that? :/ See Question&Answers more detail:os...

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

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785 views

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java - Broken pipe error when running Gradle test

I've got a problem regarding running tests in gradle. I know that in other machines my gradle config works but ... faced this kind of 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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847 views

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java - HashMap in class diagram (UML)

I build UML 2.0 class diagram for my Java application. In my code I have attribute with HashMap datatype. But ... this package on the diagram? 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 - Load jar dynamically at runtime?

My current java project is using methods and variables from another project (same package). Right now the other ... . Many 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 - Detect months with 31 days

Is there an analogous form of the following code: if(month == 4,6,9,11) { do something; } Or must it ... line that says Invalid month or day. 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 - Where should be placed maven-compiler-plugin declaration: in <plugins> or <pluginManagement>?

I have a multi-module maven project, and I want to cause all my submodules to use maven-compiler-plugin ... to maven-release-plugin too. See Question&Answers more detail:os...

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

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380 views

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java - icu4j is too big, any alternative?

I am using icu4j in my android code. The jar is about 10MB, which causes my entire application to ... user speaks. (getDisplayCountry()) See Question&Answers more detail:os...

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

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