Recent questions tagged java

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java - How to process 0000-00-00 date in jdbc MySQL query

I'm getting this exception: java.sql.SQLException: Value '0000-00-00' can not be represented as java. ... way without throwing a SQLException? 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 - Create doc with subcollection in one shot

Let's say I have collection called root Can I create document with its subcollection in one call? I mean if ... I thought only for deleted docs 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 ECONNREFUSED (Connection refused)

I have tried to send data to server with this code from my android application. try { HttpClient httpClient ... permissions in Manifest file. 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 property not resolved in parent tag

The following properties are not resolved: <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> < ... do I do wrong? 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 - Stop recursion after a certain amount of steps

This problem is confusing me. I have a tree, and I want to write a method that counts the number of ... that this would be 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 - How do I install Jung2 on eclipse?

http://jung.sourceforge.net/ Can someone walk through the steps carefully for me? I have been trying for hours ... , using the Eclipse IDE. 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 - AspectJ AOP LTW not working with dynamic loading of javaagent

Here is my sample non-working project. It contains 2 modules: aop-lib - Aspects used as lib. It contains the ... it. Any help is appreciated. 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 make Timer countdown along with progress bar?

How can I make it so that the progress bar slowly goes down with the time limit? class GamePanel extends JPanel ... / end of the entire program 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 - JVM sawtooth pattern when idle? what does the JVM do in the meantime?

I was wondering. I have a simple Java web project with a servlet. When no users are using it (I host it ... , I see the same sawtooth pattern. 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 HashSet order always same for my program?

For some tutorial, they said: HashSet doesn't maintain any order, the elements would be returned in any random ... help me, 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 - resteasy providers missing after mvn package

I have written some code that uses some resteasy libraries. The code works fine in Eclipse but produces exceptions when ... </plugins> </build> 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 - Jersey HK2 Dependency Injection

I'm writing a simple microservices that exposes REST API. So I started working with Jersey and of course I ... instance) in hk2 Thanks 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 - How to Display Row Header on JTable Instead of Column Header

How can i display my Jtable to this .. currently i only know to create this kind of jtable below is ... scrollPane1 = new JScrollPane(table1); 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 8 - Updating an attribute of an element in list with matching attribute

I am new to Java 8. I have a list of objects of class A, where structure of A is as follows: class A { ... I do that using Java 8 stream API? 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 - I cannot access Robots.txt in Spring-MVC

I am trying to give access to robots.txt in Spring-MVC. To test the code, I put robots.txt in WebContent,Root ... " /> <mvc:annotation-driven /> 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 - jersey2 Unit testing,HttpServletRequest is null

Ask everybody to help? jersey Bug connection: [1]: https://java.net/jira/browse/JERSEY-2412 The servlet ... request and response is null. 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 - Setting text on TextView from background thread anomaly

I've just started playing with Android Concurrency/Loopers/Handers, and I have just faced with strange anomaly. ... text from different thread ? 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 overloaded constructor injection

This is the code : public class Triangle { private String color; private int height; public Triangle(String color,int ... be called by Spring ? 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 - Reverse string printing method

I am trying to solve the following problem but how do write the method that accepts String as an argument? Write a ... : " + reverse); } } 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 - Passing Properties to Factory method

I have a factory method which returns implementation of an interface. The thing is - implementations have different ... Would this make sense? 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 - Moving a square from a starting point to the position of a mouse click at a fixed speed

I'm trying to move a square from it's original position to the coordinates of my mouse when I click. The ... dont sue me im too young anyways 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 distribute AWTUtilities

I recently read the blog posts on Pushing Pixels that describe how to achieve native transparency and translucency with ... program. 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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java - Control thread through button

We require a piece of code to control a thread. For example, use three buttons like start, stop and ... pause perform pause action respectively. 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 me - FileConnection permission messages in j2me midp 2.0?

I am using midp 2.0. Here, I am using FileConnection for read and write files on mobile memory. I am able to ... NULL"; }//filewrite ends here*/ 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 - PhantomReference with null queue

Java allow to write: new PhantomReference(new Object(), null) At this case new Object() will be collected? ... be cleared which case 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 - Set JAX-RS response headers in implementation without exposing HttpServletResponse in interface

I have a RESTful server implementation as well as a library for clients to make the calls, all using JAX-RS. ... Are there any other solutions? See Question&Answers more detail:os...

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

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297 views

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java - Apache POI - Cant get Line Chart Values to appear in the Secondary Axis

I can't get the Line Chart Values to appear on the Secondary Axis of the chart. When I open the ... ctLegend.addNewOverlay().setVal(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 - JNI String return value

I have a Java instance method which returns a String and I'm calling this method through JNI in C++. ... 0x00000000. returnString is not NULL. See Question&Answers more detail:os...

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

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