AbstractButton.setDisplayedMnemonicIndex(int index) has the following syntax.
public void setDisplayedMnemonicIndex(int index) throws IllegalArgumentException
In the following code shows how to use AbstractButton.setDisplayedMnemonicIndex(int index) method.
import javax.swing.AbstractButton; import javax.swing.JFrame; import javax.swing.JToggleButton; //from w w w. j av a 2 s . co m public class Main { public static void main(String[] args) { AbstractButton jb = new JToggleButton("Press Me"); jb.setDisplayedMnemonicIndex(1); JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.getContentPane().add(jb); f.pack(); f.setVisible(true); } }