4 buttons and text area in java fx code example

Example 1: javafx textarea font size

textArea.setStyle("-fx-font-size: 20");

Example 2: javafx textarea how to make smaller

import javafx.scene.control.TextArea;

TextArea textArea = new TextArea(); //making a TextArea object

textArea.setPrefHeight(400);  //sets height of the TextArea to 400 pixels 
textArea.setPrefWidth(300);    //sets width of the TextArea to 300 pixels