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Java

Posted by PRINAL PATEL
PRINAL PATEL
3,975 Points

launch(args) in main

Carig just says that the launch method is called with args as parameters. I wanted to know where and when ? does the START() method is called as thats where our nodes and scene graphics resides.

public class Main extends Application {

@Override
public void start(Stage primaryStage) throws Exception{
   // Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
    Group root = new Group();
    Text txt = new Text("Sup?");
    root.getChildren().add(txt);
    txt.setY(50);
    primaryStage.setTitle("Sup");
    primaryStage.setScene(new Scene(root, 300, 275));
    primaryStage.show();
}


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

}

Philip Gales
Philip Gales
15,193 Points

Can you link to the video?

PRINAL PATEL
PRINAL PATEL
3,975 Points

https://teamtreehouse.com/library/getting-started-6

1 Answer

Philip Gales
Philip Gales
15,193 Points

By using 'extends Application' you are inheriting the Application.java class. In that class, you call launch() and it will eventually call the start() method.

Many times in programming you will not know why something works, just that it does work by doing XYZ. Assume the XYZ in this case is calling launch(args) and creating a start method.

PRINAL PATEL
PRINAL PATEL
3,975 Points

Thanks Philip. I did debugging and went to explore...."LauncherImpl" class that eventually calls the START() method....thanks again..