(java) borderlayout

[Zero-2]

import javax.swing.JTextArea;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import java.awt.Color;
import java.awt.BorderLayout;

public class Bordi {
public static void main (String[] args) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
JTextArea lineNorth = new JTextArea("Nord");
lineNorth.setEditable(true);
lineNorth.setBackground(Color.darkGray);
lineNorth.setSize(300,30);
JTextArea lineSide = new JTextArea("Laterale");
lineSide.setEditable(true);
lineSide.setBackground(Color.darkGray);
JTextArea lineSide2= new JTextArea("Laterale");
lineSide2.setEditable(true);
lineSide2.setBackground(Color.darkGray);
lineSide.setSize(30,300);
JPanel mEditor = new JPanel();
mEditor.setLayout(new BorderLayout());

JTextArea editor = new JTextArea("Centro");
JScrollPane editorScroll = new JScrollPane();
editorScroll.add(editor);
mEditor.add(lineSide, "West");
mEditor.add(lineSide2, "East");
mEditor.add(lineNorth, "North");
mEditor.add(editor,"Center");


frame.getContentPane().add(mEditor);
frame.setSize(300,300);
frame.show();
}
}

Se le JTextArea laterali sono vuote , il componente centrale tende ad occupare tutto lo spazio