AbstractButton.isContentAreaFilled() has the following syntax.
public boolean isContentAreaFilled()
In the following code shows how to use AbstractButton.isContentAreaFilled() method.
//from w w w . j a v a 2s . c o m 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"); jb.setSelected(true); System.out.println(jb.isContentAreaFilled()); JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.getContentPane().add(jb); f.pack(); f.setVisible(true); } }