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Tag: java

Spring security application giving No AuthenticationProvider found for org.springframework.security.authentication.UsernamePasswordAuthenticationToken

I am new to spring boot. I am trying to implement a simple spring boot security with userdetailsservice in Spring Tool Suite(STS). Below is the controller I used: And the Web security configuration code: I gave all the required dependencies in pom.xml. So, I have added below line in application.propperties fi…

Can’t access file when Compile 2 package

I’m a newbie, I have learned Java for 2 months by self-study. I often use the command line to run files because I use Atom IDE. I just want to complile 2 simple packages “package1” & “package2”. Like the image, these 2 packages and a folder name target (to compile) inside &#8…

Java Object Mapper date conversion to Json

I am using ObjectMapper to convert a list of objects to JSON, however the date field converts into key-value see below current output current output: Output expected is My code: User Class Answer by registering the JavaTimeModule the issue is resolved

Algorithm to extract combinations of array

I’m stuck with the problem to find possible combinations in an array. Currently, i solving this problem using Java Programming language. Here is the example: And here is the output that i want, so i can solve the fundamental issues: The purpose is to generate combinations with sorted conditions as pairs…