Size of Text Area in java

Size of Text Area in java

I am writing a code for basic GUI. There i need a Text Area. But i can not
make the Text Area in my desirable size. i use setPreferredSize method to
set the dimension of the Text Area. But it did not work. I also tried
setSize method but did not work also. Here is my written code.
private void textArea() {
setTitle("TextArea");
setSize(700, 500);
setLayout(new BorderLayout());
JTextArea textArea = new JTextArea();
textArea.setPreferredSize(new Dimension(100,100));
System.out.println(textArea.getSize());
textArea.setBackground(Color.GREEN);
textArea.setLineWrap(true);
textArea.setWrapStyleWord(false);
add(textArea,BorderLayout.CENTER);
}
Sorry for my bad English. Thanks in advanced.