Recent questions tagged java

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java - Abstract class constructor access modifier

An abstract class can only be used as a base class which is extended by some other class, right? The ... protected on all my constructors? 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 ways for pass parameters from controller after redirect in spring mvc?

if I write in mycontroller method: return "redirect:url"; What parameters will passes to url(it maybe controler method or jsp page) ? 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 - The annotation @Index is disallowed for this location

When trying to use the @Index annotation from javax.persistence, Eclipse gives me this error. I'm using it right ... members. What am I missing? 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 - Treeset to order elements in descending order

Here is the piece of code that I have used for Java 5.0 TreeSet<Integer> treeSetObj = new TreeSet<Integer>( ... more optimized way of doing 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 - How to Get Device Height and Width at Runtime?

I am developing an app in which I have to make our app to fit for every device - for both tablet and ... TODO Auto-generated method stub } } 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 - Unit under test: Impl or Interface?

Suppose I have interface and implementation class that implements it and I want to write unit-test for this ... would definitely use interface. 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 does the protected modifier mean?

I am reading the book The Java Programming Language, 3rd edition. In chapter 3.5 , it illustrates the protected ... can explain to me please? 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 explicitly invoke default method from a dynamic Proxy?

Since Java 8 interfaces could have default methods. I know how to invoke the method explicitly from the ... /1342443276.invoke(Unknown Source) 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 - Append data into a file using Apache Commons I/O

The FileUtils.writeStringToFile(fileName, text) function of Apache Commons I/O overwrites previous text in a file. I ... using Commons I/O. 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 Boot auto configuration for datasource

I try to create Spring Boot app with Hibernate 5 and Postgres 9. Now I have next error: Parameter 0 of ... I miss some little part.. 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 - Get record with max id, using Hibernate Criteria

Using Hibernate's Criteria API, I want to select the record within a table with the maximum value for a given ... to do that with Hibernate? 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 - Transitive nature of equals method

The contract for equals(object) method specifies 4 properties to follow: Reflexive, Symmetric, Transitive and ... are well implemented. 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 - Get android seekbar value and display it on screen

I'm trying to get the value of the seek bar whenever it changes and display it underneath. I'm using the onclick ... .id.level)).setText(x); } 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 - PostMethod setRequestBody(String) deprecated - why?

I am using Apache Commons HttpClient PostMethod 3.1. In the PostMethod class there are also three methods for ... an workaround or a solution? 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 - Specify common resources in a multi-module maven project

Is there any way to share resources between modules of a parent project in Maven? For example, I would like ... resources in the parent project. 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 - Connection error: "org.jsoup.UnsupportedMimeTypeException: Unhandled content type"

When I try to open a link to parse with jsoup I get an error. Connection command: Document doc = Jsoup. ... podcast.Pods.main(Pods.java:41) 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 - IntelliJ IDEA - getClass().getResource("...") return null

I'm using IntelliJ IDEA 13.1.5, I used to work with Eclipse. I'm working on JavaFX application, I try to ... result is the same. Any idea please 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 magic: ... Syntax error, varargs are only available if source level is 1.5 or greater

Yesterday I made a project in eclipse, and it was working, compiling. I used Eclipse Galileo for Java EE. Today I open ... is 1.5. What to 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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java - Maven failing to download jar dependencies

I have a very simple default application that I've created to test my Eclipse Indigo/Maven v3.0.1 setup on ... , releases=true, snapshots=false) 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 - x > -1 vs x >= 0, is there a performance difference

I have heard a teacher drop this once, and it has been bugging me ever since. Let's say we want to check ... there any truth to this statement? See Question&Answers more detail:os...

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

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207 views

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java - How to configure a proxy server for both HTTP and HTTPS in Maven's settings.xml?

I'm using Maven 3.1.1 behind a proxy server. The same proxy handles both HTTP and HTTPS traffic. I can't ... to direct both types of traffic. 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 - Can I reference profile id in profile definition?

I've set profiles in a pom.xml, like shown as follows: <profile> <id><em>profileId1</em></id> < ... every profile (and possibly misspell 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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252 views

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java - programmatically set edit text hint in android?

is there a way to set the text hint displayed inside of an android edittext with java? I would like for ... different times, 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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230 views

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java - A long bigger than Long.MAX_VALUE

How can I get a long number bigger than Long.MAX_VALUE? I want this method to return true: boolean isBiggerThanMaxLong ... > Long.MAX_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 - How to change from -source 1.6 to -source 7 in IntelliJ IDEA

I' trying to build a in IntelliJ IDEA project that is not mine and I got the following error: java: ... change this setting in IntelliJ 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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493 views

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java - Provide time zone to Spring @Scheduled?

How can I configure the time zone for a Spring based @Scheduled cron job? Background: I have a job that ... attribute for exactly this purpose. See Question&Answers more detail:os...

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

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215 views

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java - What does it mean to say a type is "boxed"?

I have heard of types being referred to as "boxed" in some languages. In Java, I have heard of " ... working with boxed or unboxed types? See Question&Answers more detail:os...

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

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468 views

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java - Get Concrete Class name from Abstract Class

In Java, inside an abstract class can I get the instance of the concrete class that extends 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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