AbstractButton.getDisplayedMnemonicIndex() has the following syntax.
public int getDisplayedMnemonicIndex()
In the following code shows how to use AbstractButton.getDisplayedMnemonicIndex() method.
/*from ww w . ja v a2s . c om*/ import javax.swing.AbstractButton; import javax.swing.JFrame; import javax.swing.JToggleButton; public class Main { public static void main(String[] args) { AbstractButton jb = new JToggleButton("Press Me"); System.out.println(jb.getDisplayedMnemonicIndex()); JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.getContentPane().add(jb); f.pack(); f.setVisible(true); } }