Java coding session - JavaFX: find and replace substring in string with a GUI

In this video, I will be creating a simple GUI, where I import text from a .txt file and then am able to choose a word from the text and replace it with another specified word. Hope you enjoyed my video, if you did I would appreciate if you leave a like and subscribe and if you got any question just leave them in the discretion. Hope you enjoyed it!

.txt file:
public class HelloWorld {

public HelloWorld() {
}

public static void main(String[] args) {
HelloWorld helloWorld = new HelloWorld();
}
}

[switchario]

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