package TextField;
    import java.awt.FlowLayout;
    import java.awt.event.ActionListener;
    import java.awt.event.ActionEvent;
    import javax.swing.JFrame;
    import javax.swing.JTextField;
    import javax.swing.JPasswordField;
    import javax.swing.JOptionPane;

public class TextFieldFrame extends JFrame{

    private JTextField textField1;
    private JTextField textField2;
    private JTextField textField3;
    private JPasswordField passwordField;
 public TextFieldFrame(){
        super("Testing JTextField and JPasswordField");
        setLayout(new FlowLayout() );
        textField1 = new JTextField(10);
        add ( textField1 );
        textField2 = new JTextField( "Enter text here" );
        add( textField2 );
        textField3 = new JTextField( "Uneditable text field", 21);
        textField3.setEditable( false );
        add ( textField3 ); passwordField = new JPasswordField( "Hiden text" );
        add( passwordField );
        TextFieldHandler handler = new TextFieldHandler();
        textField1.addActionListener( handler );
        textField2.addActionListener( handler );
        textField3.addActionListener( handler );
        passwordField.addActionListener( handler );
    }
    private class TextFieldHandler implements ActionListener{
        @Override
        public void actionPerformed( ActionEvent event)
        {
            String string = "";
            if (event.getSource() == textField1)
                string = String.format("textField1: %s",
                    event.getActionCommand());
            else if (event.getSource() == textField2)
                string = String.format("textField2: %s",
                        event.getActionCommand());
            else if (event.getSource() == textField3)
                string = String.format("textField3: %s",
                        event.getActionCommand());
            else if (event.getSource() == passwordField)
                string = String.format("passwordField: %s",
                        event.getActionCommand());
            JOptionPane.showMessageDialog(null, string);
        }
    }
}