textarea java setPrefRowCount does not work code example

Example 1: 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

Example 2: javafx textarea size

TextArea textArea = new TextArea(); //making a TexrArea object
double height = 400; //making a variable called height with a value 400
double width = 300;  //making a variable called height with a value 300

//You can use these methods
textArea.setPrefHeight(height);  //sets height of the TextArea to 400 pixels 
textArea.setPrefWidth(width);    //sets width of the TextArea to 300 pixels