Recent questions tagged Java

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Is it possible to define something like this in java? C# code: public enum Character { A = 1, B = 2, C = ... that! Is it ever possible in Java? 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 - Can I start a thread again after it has died?

If I use start() on a Thread object and the run() method returns, is it possible to call start() again? eg, ... because you can't do the above. 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 adjust position of scroll in the scrollpane

I have created JTextpane and inserted components inside textpane (components like Jtextarea). (vertical scrollbar of ... Sunil Kumar Sahoo 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 is the need of an intValue() method if wrappers use unboxing?

For example, look at this code: Integer myInt = new Integer(5); int i1 = myInt.intValue(); int i2 = ... method when there is already unboxing? 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 limit post size in tomcat 8? How to make a custom reply for it?

I have this configured in my server.xml file <Connector URIEncoding="UTF-8" connectionTimeout="20000" maxHttpHeaderSize= ... I am missing 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 - Swing: Setting a function key (F2) as an accelerator

I have a menu item, "rename", for which F2 is set as an accelerator. Indeed when the menu is displayed ... (ks); mi.addActionListener(action); 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 - JavaFX - Border radius <-> Background color

If I add -fx-border-radius and -fx-border-width CSS to a simple GridPane, in its corner the background will not ... result: How do I fix 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 - autoboxing of numeric literals : wrapper initialization vs passing method arguments inconsistency

Please consider 2 cases: //1 Short s = 10; //obviously compiles //2 takeShort(10); //error - int is not ... , char, or int. 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 - How to force JSON-lib's JSONObject.put(..) to escape a string containing JSON?

When using JSON-lib's JSONObject, how can I stop the put method from storing a String which contains JSON as ... Jackson, simple-json, or Gson. 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 - Can a LABEL block be used without loop?

Can a LABEL block be used without loop? Any examples? 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 - How to disable Search button, how to implement onSearchRequested()?

Checked out the following: How to have clicking the phone's search button do nothing? But it does not work ... ="true"> </searchable> 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 - NullPointerException with string-array in Spinner

First app and so really new at android (played around about a year ago but nothing came of it), decent at ... .main(ZygoteInit.java:611) 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 - SAXParseException: Content is not allowed in prolog

I need to add the following file to my Tomcat's '/conf' directory: <?xml version="1.0" ... .XMLScanner.reportFatalError(XMLScanner.java:1427) 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 am I getting a crash when exiting my Activity?

I am experiencing a crash in my app when I quit (via the back button) out of my Activity. So far ... more Anyone have any ideas/recommendations? 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 - Could not initialize class javax.imageio.ImageIO

I'm trying to deploy a Spring web app to a Tomcat 7 running on a production environment on ... .java:606) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflecti...

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

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579 views

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java - How do you remove the Ctrl+C action on a JFileChooser?

I'm embedding a JFileChooser in my program in my own frame with other custom components in the frame. Here's a design ... " + component); } } } 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 - Hot deploy not longer working on JBoss ("Scheme change not implemented")

I've got a pretty annoying problem with my JBoss AS 4.2.3 GA. Until recently everything was running fine, but now ... a way out of my trouble? See Question&Answers more detail:os...

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

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942 views

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java - Type safety: The method.. belongs to the raw type.. refs to generics should be parameterized

Eclipse gives me the warning (in the title) using just the following code in a working project with nothing in ... might I resolve this warning? 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 7 language backwards compatibility

Brief question: If I use relatively "minor" Java 7 language features previously unavailable in Java 6, such as ... the try-multicatch block)? 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 - JavaDoc: private fields and methods

What JavaDoc tags should I use in private fields and methods in order to generate javaDoc descriptions? See Question&Answers more detail:os...

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

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624 views

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java - Relationship between Threads and println() statements

I was trying to create a few scenarios to demonstrate visibility issues while sharing variable across threads. And I ... any I/O operation. See Question&Answers more detail:os...

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

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965 views

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java - Getting yesterday - The method getDate() from the type Date is deprecated

I try to get the date of yesterday. So I write the next function: public String getYestrday() { DateFormat ... Thank you for your help. See Question&Answers more detail:os...

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

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851 views

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java - Int with leading zeroes - unexpected result

Given the following sample: public class Main { public static void main(String[] args) { System.out.println(1234); ... Output is: 1234 668 Why? 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 tests terminated in Debug mode

I'm using IntelliJ IDEA 15.0.2 (Community Edition) under Windows 7 and Windows 10 Pro, Gradle 2.9, JDK 1.7 ... issue. What 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 - The expression of type x is boxed into X?

I'm a little confused by a warning that my Eclipse IDE is currently writing next to every expression where ... everytime this feature is used. See Question&Answers more detail:os...

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

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680 views

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java - Get the interface name from the implementation class

Example : List<String> list = new ArrayList<String>(); //This would give me the class name for the list ... any way possible to 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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787 views

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java - How to increment time by 1 hour

I have two time values. one for the previous login time and one for the current login time. I have to ... condition. How to achieve 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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583 views

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java - Depth first search - 2D Game map

I have created a 2D maze, and I want to find the quickest path between the red->blue colored nodes. I'm ... guide me in the right direction... See Question&Answers more detail:os...

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

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