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
In this tutorial we can see how to create digital clock with Java FX. Here is the project structure: First let’s create see the HelloApplication which has the main method: As you can see we extend Application and then provide implementation of start method. We use FXMLLoader to load hello-view.fxml which contains xml representation of … Read more
In this video I share how you can install JDK (Java Development Kit ) and IntelliJ IDEA Community Edition (IDE) on Ubuntu. This two tools are necessary to start writing programs on Java.This is a list of the commands that I use:
In this example let’s see how to print all time zones using ZoneId. ZoneId is a class that is used to identify the rules used to convert between an Instant and a LocalDateTime. It is used extensively when we need to create ZonedDateTime. For example let’s look at the three static methods which create ZonedDateTime: … Read more
Let’s see some examples with Java’s ZonedDateTime class. First to understand different java date and time classes from the Java 8 new Date time API lets look at them: This answer from stackoverflow point us to: So if we need automatic calculation of the zones and also differences between summer and winter time we can … Read more
In this example we will see how to sort files in folders. We will provide two folders one for input and one for output. Then we will filter only specific files (.png and .jpg) from input folder with method listFiles. After that we will loop over the files and read the date from each file. … 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 create line chart with JavaFX. We are using LineChart. In the begging we will create two NumberAxis for X and Y coordinates. We will pass them to the constructor of LineChart. Then we will create XYChart.Series object representing series of data. We will use ObservableList and we … 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
