We are trying to preload images into cache memory to load them later (the images are located in the Asset folder of the application) What we tried: The issue: Images are cached only when we are trying to load/display them: They have to be loaded in memory before so that they appear faster. We also tried to use a GlideModule
Build docker image with jetty – when should I build?
I’m working on ‘dockerizing’ a java web application (https://github.com/kermitt2/grobid) which I want to run using jetty. Here the Dockerfile: The current docker image works perfectly, but it requires the application to be built before (it cannot be built from the fresh git clone). For example I could not run a build with the docker HUB build system. What would be
Need help on Java Swing JFrame
I’m very new to Swing and I need to build a JFrame that: Has an image on top. Below the image has 16 little images divided into 4 groups (4 “panels”), on the same “row”. Below those 16 images I need 4 “panels” on the same “row”. Every panel contains some horizontal scrollable images (of the same size). Below those
How to merge 3 sorted arrays into 1 sorted array in Big-O(N) time?
Trying to merge 3 arrays into one so that the final array is in order. Given Merge the arrays so that the final array d = {1,1,2,3,4,5} Can’t just concatenate them and then sort the d array because that would make the time complexity larger than Big-O(N). This is what I got so far. Having problems with indexes out of
Java – Slice any array at steps
In python we are able to do the following: Is there an equivalent to this in Java? I have been looking for this type of array slicing, but I have had no luck. Any help would be great, Thanks! Answer If you are using Java 8, then you can make use of streams and do the following: Outputs: [0, 3,
Mockito asks to add @PrepareForTest for the class even after adding @PrepareForTest
I have the following simple code. I have a class (TestClass) and I want to test “someMethod”. There is an external static method which is called by my “someMethod”. I want to Powermock that static method to return me some dummy object. I have the @PrepareForTest(ExternalClass.class) in the begining, but when I execute it gives the error: The class ExternalClass
netbeans dist folder jar not running [closed]
Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed 2 years ago. Improve this question I have a java program to insert from textfields data to an ms
How to resolve “Caused by: org.postgresql.util.PSQLException: ERROR: relation “employee” does not exist Position: 13″ error?
I have tried to execute the Hibernate Demo application. I’m getting the below error message. Database: PostgreSQL Hibernate Version: 5 Source code for Bean class package com.javatpoint; Test class package com.javatpoint; hibernate.cfg.xml Error Message Eclipse Project PostgreSQL Database Answer Hibernate is trying to create entity in hibernatedemo schema. You need to create that schema in database. I did not see
How to explicitly invoke default method from a dynamic Proxy?
Since Java 8 interfaces could have default methods. I know how to invoke the method explicitly from the implementing method, i.e. (see Explicitly calling a default method in Java) But how do I explicitly invoke the default method using reflection for example on a proxy? Example: Edit: I know a similar question has been asked in How do I invoke
log4j2 change Rolling file appender max files programmatically
I am working on an application that uses log4j2 (initializes the parameters using log4j2.xml) and loads the logger. When the application runs, I am required to programmatically override a few parameters such as changing the log level and rolling file appender properties. I am able to change the log level using Now I tried to tackle the same problem using