Change Horizontal Gap for FlowLayout in Java

import java.awt.Dimension;
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
/*  w  w  w.  j a  v a2s.c o m*/
public class Main {
  public static void main(String[] args) {
    FlowLayout flow = new FlowLayout(FlowLayout.LEFT, 20, 30);
    JPanel panel = new JPanel(flow);
    
    flow.setHgap(35);  
    
    
    JTextArea area = new JTextArea("text area");
    area.setPreferredSize(new Dimension(100, 100));

    JButton button = new JButton("button");
    panel.add(button);


    panel.add(new JScrollPane(area));

    JFrame f = new JFrame();
    f.add(panel);
    f.pack();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
  }
}