Let’s see how to use map grouping by functionality with Java stream. We have GenericRecord class that hold the data of the person and also the addresses of the people. In many cases we want to split this information to Peron and Addresses and we want to remove the duplicate information. See how several time … Read more
In this tutorial we will see how to make Java FX analog clock. we have Main class which Create the Circle and the hands (for hour minute and second). Then we use HandTransitions to add the angle transitions related to the hands. Back to the Main class we create VBox layout and as a main … Read more
Let’s see example of multi-thread application. For this example we will check which addresses are accessible from our local network. To do that we will require to be provided the subnet of the network local network in format x.x.x . For example 192.168.0 , 192.168.1 , 192.168.100 are some typical subnets. After that the program … Read more
In this example we will see how to execute a JavaScript function in Java using Nashorn. Also we will pass as an argument Java map (LinkedHashMap) which will be considered in the JavaScript as an object. Project structure: For this tutorial we are using Mavan with pom.xml: As you can see we are using nashorn-core … Read more
In this example we will see how to use recursion methods in Java to walk over the whole JSON structure. We will use Jackson libraries to get information about the JSON nodes. We will check if the node has other nodes. If so, then we will check them too. In JSON this can be object … Read more
How to work with Java and JSON? Sometimes in Java we need to work with different type data formats. One very common is JSON. In this tutorial we will see how to use popular Java library Jackson to read and write from JSON format. To work with external libraries like jackson-databind we can download the … Read more
This program read all files in a folder then it will filter out all rows smaller then 10 symbols and it will save then in one file Program’s steps: Test files which should be in one folder. This files contains names which can be duplicated: Output file result from this two input files. Contain only … Read more
In this example we will be using Bitcoin data in CSV (comma-separated values file) which we will custom parse and load in our application. Then user have to provide date in format year-month-day (yyyy-MM-dd) and the program will print the highest BTC (Bitcoin) price and the lowest BTC (Bitcoin) price in United States dollars. In … Read more
