This section illustrates you how to create an icon that changes from at runtime.
To create an icon, we have defined Icon class which provides three methods getIconWidth(), getIconHeight() and paintIcon(). We have defined two sliders using JSlider class to show the changes related to height and width of the icon.
The method g.fillOval(p, q, getIconWidth(), getIconHeight()) draws the oval shape. The method stateChanged() is invoked when the state is changed by the listener. To layout a container to arrange and resize its components and define five regions: north, south, east, west, and center, the class BorderLayout is used. The slider showing width is directed to the north by BorderLayout.NORTH and the slider showing height is directed to the south by BorderLayout.SOUTH. The icon is directed to the center BorderLayout.CENTER.
Here is the code of IconChangesForm.java
Output will be displayed as:
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