Recent questions tagged JAVA

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java - both File.isFile() and File.isDirectory() is returning false

I have a file with name "aaa?aa.xls" For this, File.isFile() and File.isDirectory() is returning false? why it is returning false in Linux? 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 - Serialization of a lambda after its creation

I can serialize a lambda with the following syntax: Runnable r = (Runnable & Serializable) () -> ... ; fails with a NotSerializableException. 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 - annotation based factory methods

I want to be able to autowire a singleton bean (foo) @Component public class FooUser { @Autowire Foo foo; } ... can i do it with annotation? 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 - adjust selected File to FileFilter in a JFileChooser

I'm writing a diagram editor in java. This app has the option to export to various standard image formats such as .jpg, . ... .run(); } }); } } 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 - Add secure flag to JSESSIONID cookie in spring automatically

I have a tomcat application server that is behind a nginx. SSL terminates on the nginx. The Spring web-mvc ... ' flag to JSESSION id cookie 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 JPA Specification to Select Specific Columns

We can select specific columns by writing custom @Query methods in our Repository Interface. However, I don't want ... ? Where is the mistake? 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 the project name in eclipse?

How do I get the name of the current eclipse project? I'm in a GMF view and need the projectname when some submenu of the popup menu ist 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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java - How to throw an exception from an enum constructor?

How can I throw an exception from an enum constructor? eg: public enum RLoader { INSTANCE; private ... Unhandled exception type IOException 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 - Nested generic in a generic class

I want to provide something like this in my api: class Foobar extends AbstractThing<Double> class EventThing<Foobar> { ... to get rid of 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 - Re-using PreparedStatement when using Datastax Cassandra Driver?

I'm currently using the Datastax Cassandra driver for Cassandra 2 to execute cql3. This works correctly. I started ... bind() to bind objects) See Question&Answers more detail:os...

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

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278 views

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java - How to call a super method (ie: toString()) from outside a derived class

existantial question if i have a class hierarchy like: public class TestSuper { public static class A { @Override ... doesn't compile ... 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 - Variables in Interface

Why is that a variable used in an Interface is PUBLIC STATIC FINAL? Why "static" in particular? 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 - JSONException No value for

I know that there are several questions posted on here with the same topic and error, but none of them indicate the ... to solve it. Thank you. See Question&Answers more detail:os...

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

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354 views

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java - Cucumber JVM undefined step

I can't execute a simple test with cucumber for a project. I am on Intellij 13 Community, with cucumber plugin ... some steps in both scenario. See Question&Answers more detail:os...

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

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387 views

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java - converting Document objects in MongoDB 3 to POJOS

I'm saving an object with a java.util.Date field into a MongoDB 3.2 instance. ObjectMapper mapper = new ... custom annotations to Java classes. 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 can I validate a local date time within daylight savings time?

Mar 12, 2017 02:39:00 "America/Chicago" does not exist. When I set the date and time to this value it does not fail. ... .UTC); int y = 90; } } See Question&Answers more detail:os...

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

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120 views

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java - How often is the GC executed?

Java: How often is the GC executed in JVM? Every second? Every minute? Or is it random depending on the memory ... to have an idea. Thank you. See Question&Answers more detail:os...

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

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156 views

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java - Intellij Content is not allowed in prolog

I run Intellij, and when I try to run an android app, I always have an internal error: Content is not ... .lang.Thread.run(Thread.java:745) 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 - Admob ad will not load. Error 2. It worked before but suddenly stopped

Here is the entire class that I am trying to load a banner ad into (createAd() method does the work) ... Any help is appreciated, 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 - Iterator has .next() - is there a way to get the previous element instead of the next one?

I have an Iterator that I use on a HashMap, and I save and load the iterator. is there a way to ... iterating through the keyset of the HashMap See Question&Answers more detail:os...

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

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746 views

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java - switch off scientific notation in Gson double serialization

When I use Gson to serialize an Object that contains a double value close to zero it is using the scientific ... how that is serialized. 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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529 views

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java - HtmlUnit ignore JavaScript errors?

I'm trying to traverse through a website but on one of their pages I get this error: EcmaError: lineNumber= ... if the calendar loads properly. See Question&Answers more detail:os...

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

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420 views

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java - LocalDate interval in Joda-time

Joda-time has an Interval class, which is a range between DateTimes. What can be used for a range ... getStart and getEnd return DateMidnight? See Question&Answers more detail:os...

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

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127 views

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java - Why @JavaConfig not working in Spring MVC?

I'm trying to setup Spring MVC project without dispatcher xml and web xml(i.e. without any xml at all). ... /finalName> </build> </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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103 views

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java - Apache POI : getting a number as a string, as displayed in excel

I'm trying to parse an excel workbook with POI. In a sheet, i have some numbers displayed as : 06 85 85 65 ... on this. Thanks 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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173 views

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java - Android - Count Power button clicks and Start Activity

I used the below code, but didnt find the solution. MyReceiver.java: import android.content.BroadcastReceiver; import ... me to acheive 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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337 views

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java - Log4j2 RollingFile Appender - add custom info at the start of each logfile

Using log4j2 (beta9) with java 1.7. My complete log4j2.xml: <?xml version="1.0" encoding="UTF-8"?> < ... new logfile (or any other suggestion)? See Question&Answers more detail:os...

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

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279 views

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java - How to design report with tabular format?

I have a requirement to design in ireport. I have three VOs DeliveryAllocations { private String collectorCode; ... this kind of structure? See Question&Answers more detail:os...

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

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