Java JTextField get/set columns

import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class Main extends JFrame {
  public Main() {
    super("JButton");

    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setLayout(new FlowLayout());
    JLabel nameLabel = new JLabel("Name:");
    JTextField name = new JTextField(20);

    name.setColumns(20);//from w w w. ja  v a  2s  . c o m
    
    int columns = name.getColumns();
    System.out.println(columns);
    
    getContentPane().add(nameLabel);
    getContentPane().add(name);

  }

  public static void main(String[] args) {
    Main frame = new Main();
    frame.pack();
    frame.setVisible(true);
  }
}