How create zoom in and zoom out buttons in a JfreeChart

hi,
i want implements a "zoom in" and "zoom out" functionalitys form my Jfreechart. in a popupmenu this function there is, but i want create two buttons.
I don't know how implement this.
Can you help me???
Tanx
P.S. Sorry for my english :D

If you right click on any of the JFreeChart standard examples you will see buttons that allow you to zoom in and zoom out. Just follow the code that the examples use. This feature can be enabled/disabled using the parameters in the chart construction. Check the Javadoc.

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