Recent questions tagged java

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java - sql jdbc getgeneratedkeys returns column "id" not found, column type unknown

I want to retrieve the most recently updated value in the table using an insert query. these are the ... -to-auto-increment-primary-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 - Spring Integration manually start/stop channel adapter via control bus

Is there anyway to manually start/init a channel adapter? I have two pairs of inbound/outbound adapters in my ... thing would fit here exactly? 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 - Run external program concurrently and communicate with it through stdin / stdout

I want to be able to run an external program concurrently with my Java code, i.e. I want to start the ... best way to accomplish this? 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 - HTTPS connection with basic auth result into Unauthorized

I am trying to access Basecamp API from my Android/Java source code following way .... import org.apache.http. ... a right way to do so. 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 - Test autocomplete with Selenium webdriver

I have a text box in which when I type one letter say 's' , it displays a list of results ( like google ... [@id='destination']", "keydown"); 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 happens when we pass int arguments to the overloading method having float as a parameter for one method and another having double param

In overloading concept, i am having one doubt, that is . when i comes to overload the method with int value the ... taking place in this area?. 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 - Conversion of byte[] into a String and then back to a byte[]

I am working on a proxy server. I am getting data in byte[] which I convert into a String to perform certain ... Can some one 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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java - JSTL c:forEach causes @ViewScoped bean to invoke @PostConstruct on every request

Again i see that the @PostConstruct is firing every time even though no binding attribute is used. See this ... programmers from using jstl? 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 - Performing math operation when operator is stored in a string

I have 2 integers: int first= 10; int second = 20; and a string representing the operation (one of +, -, /, ... of 10 + 20 in this example? 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 - Using JPA Criteria Api and hibernate spatial 4 together

Given the query example here: http://www.hibernatespatial.org/tutorial-hs4.html Query query = em.createQuery(" ... location, :filter) part. 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 my overflow dropdown menu on top of the actionbar?

By default isn't it supposed to be under the actionbar? So what am I doing wrong? @Override public boolean ... ="never"/> </menu> 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 tell eclipse to add-exports when compiling

Is it possible to tell eclipse to add the following command line option: --add-exports jdk.compiler/com.sun.tools. ... but that did not 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 - Custom Class Level Constraint for Crossfield validation not called

I am trying to implement a crossfield validation (JSR-303) with a custom annotation on class level. However ... taken from this post question 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 - Where do I define `springSecurityFilterChain` bean?

When I place the bean definition for springSecurityFilterChain in web.xml, I get an error indicating that Tomcat 7 will ... /index.jsp"); } } 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 put(bind) object to jndi in spring declaratively?

We have a plain standalone spring application and we need to put jdbc datasource in jndi. (we use jboss ... way to do it declaratively? 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 Insert a Linefeed with PDFBox drawString

I have to make a PDF with a Table. So far it work fine, but now I want to add a wrapping feature ... possible to add linefeed with drawString? 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 - Create a triangle out of stars using only recursion

I need to to write a method that is called like printTriangle(5);. We need to create an iterative method ... variables or any external 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 - How to display animation in a JTable cell

I am looking for a way to display an animated progress indicator (animated GIF, a rotating wheel rendered through ... than just a simple text. 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 parse XML for <![CDATA[]]>

How to parse a XML having data included in <![CDATA[---]... how can we parse the xml and get the data included in CDATA ??? 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 sort Integer digits in ascending order without Strings or Arrays?

I'm trying to sort the digits of an integer of any length in ascending order without using Strings, arrays or ... class our professor gave us. 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 - Unmanaged Threads Spring Quartz Websphere Hibernate

It appears that our implementation of using Quartz - JDBCJobStore along with Spring, Hibernate and Websphere is ... for this issue. 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 - JPA - difference in the use of the mappedBy property to define the owning entity

What exactly is the difference in the following two declarations B is the owning side @Entity class A { @Id int ... an equivalent in normal SQL. 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 - Abstract DAO pattern and Spring's "Proxy cannot be cast to ..." problem!

I know this is very often asked , but I cannot find a working solution : This is my AbstractDAO : public interface ... 2.0-api-1.0.0 , 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 - Using JSTL causes deferredExpression error on change

I recently removed all scriptlets on my project as advised by this post. But now, if I try and ... .run(QueuedThreadPool.java:582) 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 - JSch to add private key from a string

I have the contents of the key pair file for SFTP as a string. I need to use JSch to add the contents, but ... I'm not sure what this does. 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 should I interpret the coordinates of a rectangle in PDF?

I would like to know more about the coordinates of a Rectangle, in particular: lower left X lower left ... about these coordinates positions? 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 - Regex Pattern Catastrophic backtracking

I have the regex shown below used in one of my old Java systems which is causing backtracking issues lately. ... 124567],[1234567],[1234567]] 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 bit manipulation

byte x = -1; for(int i = 0; i < 8; i++) { x = (byte) (x >>> 1); System.out.println("X: " + x); } As ... output to be: X: -1, x: 127, x: 63, etc. See Question&Answers more detail:os...

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

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