143  * href="package-summary.html#threading">Swing's Threading
 144  * Policy</a>.
 145  * <p>
 146  * <strong>Warning:</strong>
 147  * Serialized objects of this class will not be compatible with
 148  * future Swing releases. The current serialization support is
 149  * appropriate for short term storage or RMI between applications running
 150  * the same version of Swing.  As of 1.4, support for long term storage
 151  * of all JavaBeans&trade;
 152  * has been added to the <code>java.beans</code> package.
 153  * Please see {@link java.beans.XMLEncoder}.
 154  *
 155  * @beaninfo
 156  *   attribute: isContainer false
 157  * description: A component which allows for the editing of a single line of text.
 158  *
 159  * @author  Timothy Prinzing
 160  * @see #setActionCommand
 161  * @see JPasswordField
 162  * @see #addActionListener

 163  */
 164 @SuppressWarnings("serial") // Same-version serialization only
 165 public class JTextField extends JTextComponent implements SwingConstants {
 166 
 167     /**
 168      * Constructs a new <code>TextField</code>.  A default model is created,
 169      * the initial string is <code>null</code>,
 170      * and the number of columns is set to 0.
 171      */
 172     public JTextField() {
 173         this(null, null, 0);
 174     }
 175 
 176     /**
 177      * Constructs a new <code>TextField</code> initialized with the
 178      * specified text. A default model is created and the number of
 179      * columns is 0.
 180      *
 181      * @param text the text to be displayed, or <code>null</code>
 182      */

 143  * href="package-summary.html#threading">Swing's Threading
 144  * Policy</a>.
 145  * <p>
 146  * <strong>Warning:</strong>
 147  * Serialized objects of this class will not be compatible with
 148  * future Swing releases. The current serialization support is
 149  * appropriate for short term storage or RMI between applications running
 150  * the same version of Swing.  As of 1.4, support for long term storage
 151  * of all JavaBeans&trade;
 152  * has been added to the <code>java.beans</code> package.
 153  * Please see {@link java.beans.XMLEncoder}.
 154  *
 155  * @beaninfo
 156  *   attribute: isContainer false
 157  * description: A component which allows for the editing of a single line of text.
 158  *
 159  * @author  Timothy Prinzing
 160  * @see #setActionCommand
 161  * @see JPasswordField
 162  * @see #addActionListener
 163  * @since 1.2
 164  */
 165 @SuppressWarnings("serial") // Same-version serialization only
 166 public class JTextField extends JTextComponent implements SwingConstants {
 167 
 168     /**
 169      * Constructs a new <code>TextField</code>.  A default model is created,
 170      * the initial string is <code>null</code>,
 171      * and the number of columns is set to 0.
 172      */
 173     public JTextField() {
 174         this(null, null, 0);
 175     }
 176 
 177     /**
 178      * Constructs a new <code>TextField</code> initialized with the
 179      * specified text. A default model is created and the number of
 180      * columns is 0.
 181      *
 182      * @param text the text to be displayed, or <code>null</code>
 183      */