https://openjdk.java.net/ 
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package javax.swing;

import java.awt.Graphics;
import java.awt.Component;



A small fixed size picture, typically used to decorate components.

See Also:
  • ImageIcon
Since:1.2
/**
 * A small fixed size picture, typically used to decorate components.
 *
 * @see ImageIcon
 * @since 1.2
 */

public interface Icon
{
    
Draw the icon at the specified location.  Icon implementations
may use the Component argument to get properties useful for
painting, e.g. the foreground or background color.

Params:
  • c –  a Component to get properties useful for painting
  • g –  the graphics context
  • x –  the X coordinate of the icon's top-left corner
  • y –  the Y coordinate of the icon's top-left corner
/**
     * Draw the icon at the specified location.  Icon implementations
     * may use the Component argument to get properties useful for
     * painting, e.g. the foreground or background color.
     *
     * @param c  a {@code Component} to get properties useful for painting
     * @param g  the graphics context
     * @param x  the X coordinate of the icon's top-left corner
     * @param y  the Y coordinate of the icon's top-left corner
     */
    void paintIcon(Component c, Graphics g, int x, int y);

    
Returns the icon's width.

Returns:an int specifying the fixed width of the icon.
/**
     * Returns the icon's width.
     *
     * @return an int specifying the fixed width of the icon.
     */
    int getIconWidth();

    
Returns the icon's height.

Returns:an int specifying the fixed height of the icon.
/**
     * Returns the icon's height.
     *
     * @return an int specifying the fixed height of the icon.
     */
    int getIconHeight();
}