Java JPasswordField(int columns) Constructor

public JPasswordField(int columns)

/* www . j a v  a  2 s.c  o  m*/

import java.awt.Color;
import java.awt.FlowLayout;

import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class Main extends JFrame {
  public Main() {
    super("JLayeredPane Demo");
    setSize(256, 256);

    JPanel content = new JPanel();
    content.setLayout(new BoxLayout(content, BoxLayout.Y_AXIS));
    content.setOpaque(false);

    JLabel label1 = new JLabel("Username:");
    label1.setForeground(Color.white);
    content.add(label1);

    JTextField field = new JTextField(15);
    content.add(field);

    JLabel label2 = new JLabel("Password:");
    label2.setForeground(Color.white);
    content.add(label2);

    JPasswordField fieldPass = new JPasswordField(15);
    content.add(fieldPass);

    setLayout(new FlowLayout());
    add(content);
    ((JPanel) getContentPane()).setOpaque(false);

    ImageIcon earth = new ImageIcon("largeJava2sLogo.png");
    JLabel backlabel = new JLabel(earth);
    getLayeredPane().add(backlabel, new Integer(Integer.MIN_VALUE));
    backlabel.setBounds(0, 0, earth.getIconWidth(), earth.getIconHeight());
    super.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setVisible(true);
  }

  public static void main(String[] args) {
    new Main();
  }
}