IT. Expert System.

Java Standard Edition (SE)

JRadioButtonMenuItem


javax.swing

Class JRadioButtonMenuItem

  • All Implemented Interfaces:
    ImageObserver, ItemSelectable, MenuContainer, Serializable, Accessible, MenuElement, SwingConstants


    public class JRadioButtonMenuItem
    extends JMenuItem
    implements Accessible
    An implementation of a radio button menu item. A JRadioButtonMenuItem is a menu item that is part of a group of menu items in which only one item in the group can be selected. The selected item displays its selected state. Selecting it causes any other selected item to switch to the unselected state. To control the selected state of a group of radio button menu items, use a ButtonGroup object.

    Menu items can be configured, and to some degree controlled, by Actions. Using an Action with a menu item has many benefits beyond directly configuring a menu item. Refer to Swing Components Supporting Action for more details, and you can find more information in How to Use Actions, a section in The Java Tutorial.

    For further documentation and examples see How to Use Menus, a section in The Java Tutorial.

    Warning: Swing is not thread safe. For more information see Swing's Threading Policy.

    Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans package. Please see XMLEncoder.

    See Also:
    ButtonGroup
    • Constructor Detail

      • JRadioButtonMenuItem

        public JRadioButtonMenuItem()
        Creates a JRadioButtonMenuItem with no set text or icon.
      • JRadioButtonMenuItem

        public JRadioButtonMenuItem(Icon icon)
        Creates a JRadioButtonMenuItem with an icon.
        Parameters:
        icon - the Icon to display on the JRadioButtonMenuItem
      • JRadioButtonMenuItem

        public JRadioButtonMenuItem(String text)
        Creates a JRadioButtonMenuItem with text.
        Parameters:
        text - the text of the JRadioButtonMenuItem
      • JRadioButtonMenuItem

        public JRadioButtonMenuItem(Action a)
        Creates a radio button menu item whose properties are taken from the Action supplied.
        Parameters:
        a - the Action on which to base the radio button menu item
        Since:
        1.3
      • JRadioButtonMenuItem

        public JRadioButtonMenuItem(String text,
                                    Icon icon)
        Creates a radio button menu item with the specified text and Icon.
        Parameters:
        text - the text of the JRadioButtonMenuItem
        icon - the icon to display on the JRadioButtonMenuItem
      • JRadioButtonMenuItem

        public JRadioButtonMenuItem(String text,
                                    boolean selected)
        Creates a radio button menu item with the specified text and selection state.
        Parameters:
        text - the text of the CheckBoxMenuItem
        selected - the selected state of the CheckBoxMenuItem
      • JRadioButtonMenuItem

        public JRadioButtonMenuItem(Icon icon,
                                    boolean selected)
        Creates a radio button menu item with the specified image and selection state, but no text.
        Parameters:
        icon - the image that the button should display
        selected - if true, the button is initially selected; otherwise, the button is initially unselected
      • JRadioButtonMenuItem

        public JRadioButtonMenuItem(String text,
                                    Icon icon,
                                    boolean selected)
        Creates a radio button menu item that has the specified text, image, and selection state. All other constructors defer to this one.
        Parameters:
        text - the string displayed on the radio button
        icon - the image that the button should display
    • Method Detail

      • paramString

        protected String paramString()
        Returns a string representation of this JRadioButtonMenuItem. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null.
        Overrides:
        paramString in class JMenuItem
        Returns:
        a string representation of this JRadioButtonMenuItem
      • getAccessibleContext

        public AccessibleContext getAccessibleContext()
        Gets the AccessibleContext associated with this JRadioButtonMenuItem. For JRadioButtonMenuItems, the AccessibleContext takes the form of an AccessibleJRadioButtonMenuItem. A new AccessibleJRadioButtonMenuItem instance is created if necessary.
        Specified by:
        getAccessibleContext in interface Accessible
        Overrides:
        getAccessibleContext in class JMenuItem
        Returns:
        an AccessibleJRadioButtonMenuItem that serves as the AccessibleContext of this JRadioButtonMenuItem


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