BD Computer Technology - Java Programming: SWING

java.lang.Object
 java.awt.Component
     java.awt.Container
         javax.swing.JComponent
             javax.swing.text.JTextComponent
                 javax.swing.JTextField

Constructor Summary
`JTextField()` Constructs a new `TextField`.
`JTextField(Document doc, String text, int columns)` Constructs a new `JTextField` that uses the given text storage model and the given number of columns.
`JTextField(int columns)` Constructs a new empty `TextField` with the specified number of columns.
`JTextField(String text)` Constructs a new `TextField` initialized with the specified text.
`JTextField(String text, int columns)` Constructs a new `TextField` initialized with the specified text and columns.

Method Summary
`void`	`addActionListener(ActionListener l)` Adds the specified action listener to receive action events from this textfield.
`protected void`	`configurePropertiesFromAction(Action a)` Factory method which sets the `ActionEvent` source's properties according to values from the `Action` instance.
`protected PropertyChangeListener`	`createActionPropertyChangeListener(Action a)` Factory method which creates the `PropertyChangeListener` used to update the `ActionEvent` source as properties change on its `Action` instance.
`protected Document`	`createDefaultModel()` Creates the default implementation of the model to be used at construction if one isn't explicitly given.
`protected void`	`fireActionPerformed()` Notifies all listeners that have registered interest for notification on this event type.
`AccessibleContext`	`getAccessibleContext()` Gets the `AccessibleContext` associated with this `JTextField`.
`Action`	`getAction()` Returns the currently set `Action` for this `ActionEvent` source, or `null` if no `Action` is set.
`ActionListener[]`	`getActionListeners()` Returns an array of all the `ActionListener`s added to this JTextField with addActionListener().
`Action[]`	`getActions()` Fetches the command list for the editor.
`int`	`getColumns()` Returns the number of columns in this `TextField`.
`protected int`	`getColumnWidth()` Returns the column width.
`int`	`getHorizontalAlignment()` Returns the horizontal alignment of the text.
`BoundedRangeModel`	`getHorizontalVisibility()` Gets the visibility of the text field.
`Dimension`	`getPreferredSize()` Returns the preferred size `Dimensions` needed for this `TextField`.
`int`	`getScrollOffset()` Gets the scroll offset, in pixels.
`String`	`getUIClassID()` Gets the class ID for a UI.
`boolean`	`isValidateRoot()` Calls to `revalidate` that come from within the textfield itself will be handled by validating the textfield, unless the textfield is contained within a `JViewport`, in which case this returns false.
`protected String`	`paramString()` Returns a string representation of this `JTextField`.
`void`	`postActionEvent()` Processes action events occurring on this textfield by dispatching them to any registered `ActionListener` objects.
`void`	`removeActionListener(ActionListener l)` Removes the specified action listener so that it no longer receives action events from this textfield.
`void`	`scrollRectToVisible(Rectangle r)` Scrolls the field left or right.
`void`	`setAction(Action a)` Sets the `Action` for the `ActionEvent` source.
`void`	`setActionCommand(String command)` Sets the command string used for action events.
`void`	`setColumns(int columns)` Sets the number of columns in this `TextField`, and then invalidate the layout.
`void`	`setDocument(Document doc)` Associates the editor with a text document.
`void`	`setFont(Font f)` Sets the current font.
`void`	`setHorizontalAlignment(int alignment)` Sets the horizontal alignment of the text.
`void`	`setScrollOffset(int scrollOffset)` Sets the scroll offset, in pixels.

Example:

import java.awt.*;
import javax.swing.*;

public class jtextbox extends JApplet{
JTextField text= new JTextField(18);

public jtextbox() {
Container frame = getContentPane();
frame.setLayout(new FlowLayout());
frame.add(text);
text.setText("Hellow From Java");
}
}

SWING - JTextBox