I would like to serialize a given hashmap into json and deserialize it back to the original map. Here I would like to make this generic so that it behaves seamlessly regardless of the type of the value. I am using the following code snippet for constructing the map and then serailizing it as json: This is working fine when
Tag: java
GSON – trim string during deserialization from JSON
I have a JSON string that is parsed using the GSON library into a Map like so: The problem I have is, my JSON attribute values have trailing/leading whitespaces that needs to be trimmed. Ideally, I want this to be done when the data is parsed to the Map using GSON. Is something like this possible? Answer You need to
In my implementation I want to have different return type of the method
I have the following problem. I have the interface: I have two implementations: and What I want to do is to change the code and the return type of TimeParser so that it returns the result of type Map<String, List <LocalTime>. I have read that in order to have a different type I need to have a sub-class of the
Required character converter is not available. ERRORCODE=-4220, SQLSTATE=null
The application I migrate to Java8 was running on Java7. After the migration i had to update the db2jcc.jar to latest version and yet I have the error below: I have checked and tried the topic Getting error code 4220 with null SQL State Has anyone faced this before? Regards Answer Your question included The exception text included: Notice the
Problem with texture not showing in screen. OpenGL ES
I am newbie in opengl es 2 programming, I was trying to load a texture in png format in my test application. I used PNGDecoder to do this, but just the black rectangle and the line are show in the screen. What is wrong? Renderer: Fragment Shader: Vertex Shader: Square2D (is used to store vertex positions): Answer glVertexAttribPointer can be
openjdk-8-jdk – missing src.zip?
Below is the required info – To query the installed binaries, i tried below – On looking in to the jvm/java-8-openjdk-amd64 directory, I see the link for src.zip is broken Now how do i get the sources, i think i can get them manually – is this the only option I am left with?? Answer assuming you are running Ubuntu
Access user info from SecurityIdentity using quarkus-oidc
I am using quarkus-oidc with keycloak and I have the following resource My quarkus configurations is the following I am calling the query as follow The content of the jwt is How can I access the user info stored in the token using quarkus oidc? I’ have seen that there is an option quarkus.oidc.authentication.user-info-required=true which will be calling the keycloak
Specific JDK in eclipse.ini for Eclipse IDE version 2020-09 use JDK 15, not default JDK what declared in system environment variable
Eclipse 2020-09, Error: I must set Java environment to JDK 1.8 for Gradle work correctly in some case. File eclipse.ini but Eclipse still not start. My JDKs in my PC: How to declare JDK 15 to eclipse.ini ? Answer -vm and C:Program FilesJavajdk-15binjavaw.exe have to be two lines directly before the line -vmargs, not after that line (see Eclipse wiki:
FreeMarker configuration conflict (Spring Boot)
I have a FreeMarker configuration: And dependencies from build.gradle: It works okay. But when I set following dependency in build.gradle: implementation ‘org.springframework.boot:spring-boot-starter-data-rest’ I’ll get an error: Seems like spring-data-rest provides configured FreeMarker too and conflict happens. @Primary and @Qualifier don’t work. What can I do? [UPDATE] Tried to add exclude to my main class: Now application can start, but FreeMarker
Best way to serialize composite – (design pattern)
I have following java code that is implementation of Composite Design pattern: There are 2 possible composite roots here (CompositeA and CompositeB) and one leaf component (Leaf). Here I define DTOs that will hold serialized data: Now if I use visitor pattern for serialization, I get something like this: and if I use instanceof this is the code that does