19. FlowPane

Different randomly colored circles, of increasing size, are added in a FlowPane layout.

Circle creation is in the addCirc() method. Circles are added Left to Right and and then Top to Down in default setup.

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package ex19;

import java.util.Random;
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.layout.FlowPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;

public class Ex19 extends Application {
    
    FlowPane flowPane = new FlowPane();
    
    @Override
    public void start(Stage primaryStage) {
        
        flowPane.setVgap(10);
        flowPane.setHgap(10);
        flowPane.setPadding(new Insets(25));
        Random random = new Random();
        int r, g, b;
        for (int i=10; i<80; i+=5) {
            r = random.nextInt(256);
            g = random.nextInt(256);
            b = random.nextInt(256);
            addCirc(i, Color.rgb(r, g, b));
        }
        
        Scene scene = new Scene(flowPane, 500, 500, Color.HONEYDEW);
        
        primaryStage.setTitle("Example 19. Flowpane");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }

    private void addCirc(double radius, Color color) {
        Circle circle = new Circle();
        circle.setRadius(radius);
        circle.setFill(color);
        flowPane.getChildren().add(circle);
    }
}

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This is the output:

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