Do lambda expressions have any use other than saving lines of code? Are there any special features provided by lambdas which solved problems which weren't easy
I'm new to implementing web services and I'm doing it with jax-rs API using eclipse IDE for java-ee developers 2022. I have written a simple web service that re
I'm trying to solve the problem below from CodeFights. I left my answer in Java after the question. The code works for all the problems, except the last one. Ti
I am trying to connect my Servlet to mysql database using data Source . But whenever I run my servlet I end up getting this exception : java.lang.AbstractMetho
I am trying to build a HashMap which will have integer as keys and objects as values. My syntax is: HashMap<int, myObject> myMap = new HashMap<int, m
Environment: Spring Boot 2.3.1, Java 11 I have tried out a few things already (also comparing with the sample-app by spring), but so far I have been unsuccessfu
I'm trying to send an email using JavaMail through Gmail SMTP Server. This is the code: final String username = "[email protected]"; final String password = "my
I want to print a double value in Java without exponential form. double dexp = 12345678; System.out.println("dexp: "+dexp); It shows this E notation: 1.23456
I have JSON-object which has a dynamic key inside it. I need to get a specific value mapped to this dynamic Key. For example: value "10.00" will be returned for
I'm trying to make it when you click the cameraButton, the graphics show, but when clicked again, it closes. @Override public void paintComponent(Graphics g
I'm a newbie with Hibernate, and I'm writing a simple method to return a list of objects matching a specific filter. List<Foo> seemed a natural return typ
There is a certain library I use in my project. This library has an interface which has about 15 methods. The purpose of this interface is to make it possible
I am creating and staging gcp dataflow template in cloud storage with following command: mvn -X compile exec:java -Dexec.mainClass=main.java.TemplatePipeline -D
Currently I am working with the Schneider Power Logic electrical device. I want to read the data from the device and show the value in my system. So far, I disc
At the start of my Java application, I have the user enter his username and password. These credentials are stored in a ConnectionKey object which is used as th
I use keycloak-spring-boot-starter to protect my rest-service from unauthorized access. The authentication works as expected, but if the authentication fails, t
I have a Maven build configured to use maven-toolchains-plugin, with ~/.m2/toolchains.xml simply configured for multiple JDKs: <?xml version="1.0" encoding=
I'm trying to create a query that would depend on number of boolean parameters. The function that creates the predicate looks like this: Predicate createPredic
I am attempting to employ the functionality of Deploying to Wildfly 9 in my build process with the Wildfly-Maven plugin. I am unable to deploy the application,
In Java, is there any way to initialize a field before the super constructor runs? Even the ugliest hacks I can come up with are rejected by the compiler: cla