Recent questions tagged java

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java - How can I left-align strings using String.format()?

I'm using String.format() in Java trying to emulate the printf() control channel available in C. I understand how ... '-' as an empty space 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 SQLiteOpenHelper: Why onCreate() method is not called?

I am trying to make my first Android app. I noticed that the SQLiteOpenHelper.onCreate() method is not called to ... { db.endTransaction(); } } 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 - Does Hibernate always need a setter when there is a getter?

We have some Hibernate getter methods annotated with both @Column and @Basic. We get an exception if we don't ... around the error condition.. 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 get type of a view

How can i do this? something: final View view=FLall.getChildAt(i); if (view.getType()==ImageView) { ... } 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 - Compare Date objects with different levels of precision

I have a JUnit test that fails because the milliseconds are different. In this case I don't care about ... ); assertEquals(dateOne, dateTwo); 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 deserialize a class with overloaded constructors using JsonCreator

I am trying to deserialize an instance of this class using Jackson 1.9.10: public class Person { ... constructors using Jackson? 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 - Why not JSF pages are precompiled (atleast partially) but instead parsed, evaluated each time view is built?

I don't know whether it is true or not but from what I've read, I believe, JSF EL & xhtml pages are ... improve rendering time of the pages ? 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 Cache Json data to be available offline?

I have parsed the JSON Data in a listview and now I want to make it available offline. Is there a way to save the ... ()); } return ret; } } 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 - Make Selenium Webdriver Stop Loading the page if the desired element is already loaded?

I am creating a test and having some issues. Here is the scenario. I use Selenium Web driver to fill out ... SOLUTION: Scroll below for answer! 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 - Using global exception handling with "setUncaughtExceptionHandler" and "Toast"

I am trying to create a simple exception handler which will help me debug the application. Right now, when I ... see exception details. 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 - Generate JNLP dynamically

I need to pass argument to JNLP dynamically for which I tried using a servlet which extends JnlpDownloadServlet and then ... How to solve 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 - Tool to remove JavaDoc comments?

Is there any tool / Eclipse plugin that can remove all JavaDoc comments in a file? The normal (non-JavaDoc) ... intact after running the tool. 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 - LOG4J in Android

I have a Java Project with a lot of files, which is using LOG4J. Now I am trying to Port it to ... something? Pointer to any working 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 - Why does a single threaded process execute on several processors/cores?

Say I run a simple single-threaded process like the one below: public class SirCountALot { public static void ... of them are doing anything: 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 compare two maps by their values

How to compare two maps by their values? I have two maps containing equal values and want to compare them by ... the code to obtain a true? 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 does the Euclidean Algorithm work?

I just found this algorithm to compute the greatest common divisor in my lecture notes: public static int gcd( int ... eluding me. Help 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 - What is the jasperrepots-fonts jar for and how to use it?

i'm evaluating JasperReports for report generation. I have some problems with report portability between Windows and ... more about this jar? 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 disable tomcat caching?

how to disable tomcat caching? I use this - <Context antiJARLocking="true" antiResourceLocking="true" cachingAllowed=" ... xml but it not helps 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 iterate over Binary Tree?

Right now I have private static void iterateall(BinaryTree foo) { if(foo!= null){ System.out.println(foo. ... Iteration instead of a recursion? 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 create a Script Mapper in Keycloak?

I need to create a Protocol Mapper of type Script Mapper in Keycloak. The script should get a user attribute, ... help would be mostly welcome. See Question&Answers more detail:os...

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

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174 views

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java - How can we maintain Immutability of a class with a mutable reference

I know all the basic rules to make our class immutable but I am a little confused when there is another class ... this.street = street; } } 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/configure the EJB Timer Service’s DataSource

I'm trying to use the Timer Service in EJB 3.1 in my app. @Stateless @LocalBean public class StatelessTimerSessionBean { ... : glassfish-3.1.2.2 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 - Pre-initializing a pool of worker threads to reuse connection objects (sockets)

I need to build a pool of workers in Java where each worker has its own connected socket; when the ... socket object create/destroy overhead. 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 - display image on jsp file

my model store image described with file name (as String) and data (as byte array). I use Hibernate and here's ... </list> </property> </bean> 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 a custom Jackson annotation

A project needs to use the following combinaison of Jackson annotations together a lot. So, is there a way to ... @Id private String id; } See Question&Answers more detail:os...

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

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163 views

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java - Hibernate enum mapping

I need to map the enums which didn't implement the interface beforehand to the existing database, which ... support this functionality?). See Question&Answers more detail:os...

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

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196 views

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java - How to increase and decrease the volume programmatically in Android

I created a music player app and I want to set the volume up/down programmatically. I want to implement ... musicArtistName" /> </LinearLayout> 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 - Junit Test of Setters and Getters of Instance Variables

When creating test cases for setters and getters of instance variables within the object. What is the best approach? ... (expResult, result); } See Question&Answers more detail:os...

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

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