Some notes on setting up Java for my course.
First step is to get the JDK, the Java Development Kit.
https://jdk.java.net/19/
Get the zip file and extract it to C:bin.
Now we need to add java to the environment so that windows knows about it.
This is a system variable.
JAVA_HOME = C:\bin\jdk-19.0.1
You will also need to add the bin directory to the PATH so java can be used from the commandline.
C:\bin\jdk-19.0.1\bin
Open the command prompt and simply type in java
. This should result in the java help being printed.
Now we have Java ready to go.
Next up, javafx, the GUI library.
https://gluonhq.com/products/javafx/
Download the SDK, the software development kit as a zip. Extract the zip to C:bin as well.
Download Eclipse as a zip package and we will do the same thing as before, extract it to C:bin.
https://www.eclipse.org/downloads/packages/
We should now have the following structure in C:bin:
C:\bin\jdk-19.0.1
C:\bin\javafx-sdk-19
C:\bin\eclipse
The first step is to make sure java is installed properly before we get to JavaFX.
To do this, make a hello-world project and quickly get something on the screen.
package helloworld;
class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello World!");
}
}
The first step to getting JavaFX working with eclipse is to follow the below instructions:
https://openjfx.io/openjfx-docs/#install-javafx
https://docs.oracle.com/javafx/2/get_started/hello_world.htm
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class HelloWorld extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
primaryStage.setTitle("Hello World!");
Button btn = new Button();
btn.setText("Say 'Hello World'");
btn.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
System.out.println("Hello World!");
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
primaryStage.setScene(new Scene(root, 300, 250));
primaryStage.show();
}
}