I’m looking for a way to encrypt/decrypt files/byte arrays without calling compression of input. To be more precises don’t want to use something like ByteArrayOutputStream bOut = new …
Tag: java
How to convert a CSV file to List<Map>
I have a CSV file which has a header in the first line. I want to convert it to List<Map<String, String>>, where each Map<String, String> in the list represents a record in the file. The key of the map is the header and the value is the actual value of the field. What I have so far: What fur…
Convert Base64 into PDF without converting it into an Image in JAVA
I’ve done converting PNG to PDF using itext. How can i convert BASE64 into a PDF File, how can i achieve this. Thank you Answer You can add b64 image to pdf like this:
Jacoco Maven multi module project coverage
Seems like there are couple of questions, which are quite old and things changed from Java 8 support of Jacoco. My Project contains following structure I have configured the main pom like this Main POM.xml A Pom.xml B pom.xml I am executing this command mvn clean package. I can see jacoco.exec is getting gene…
Is this qualified as a switch statement?
I have to use this as a switch statement. This is a switch statement, right? if (dGrade > 93.99) {strFGrade= strA;} //A= above 94 else if (dGrade >= 90.00 &…
writing to OutputStream having capacity restriction
Following the question I asked before: I am implementing an ByteArrayOutputStream having capacity restriction. My main limitation is an amount of available memory. So having such stream os: When I write more than say 1MB to the output stream I need to “stop”. I prefer not throw exception but write…
Why is throws part of the method signature
Why throws, on a method, is part of its signature? It seems strange to include it. Here is an example where it is in the way: If anyone were to see this method from the outside, they might try to use it without knowing that it is not supported. They would only learn it on trying to run the code.
Android Studio – Keystore was tampered with, or password was incorrect
I am trying to generate a signed APK by using the built-in widget in Android Studio v1.4. However, I got this annoying error Error:Execution failed for task ‘:app:packageRelease’. Failed to read key cckey from store “C:UsersLancelotDesktoprelease.jks”: Keystore was tampered with, or pa…
How to open multiple windows with Processing?
I’m trying to create two windows with Processing. Before you mark this as a duplicate, as there are other questions similar to this, I have a specific error and I can’t find a solution. When I try to add(s) I get the error The method add(Component) in the type Container is not applicable for the a…
jsonschema and date type
I’m just getting started with jsonschema and an example under “Using jsonschema2pojo within your Java project (embedded)” in https://github.com/joelittlejohn/jsonschema2pojo/wiki/Getting-Started having in mind data types of jsonschema listed here https://developers.google.com/discovery/v1/ty…