This program below incorrectly prints false since JDK 6 b33 in April 2005 :

import java.awt.Font;

public class FNE {

    public static void main(String[] args) throws Exception {
        Font f1 = new Font("Lucida Sans", Font.PLAIN, 12);
        Font cf1 = f1.deriveFont(Font.PLAIN, 12f);
        f1.getAttributes();
        //cf1.getAttributes();
        System.out.println("equal="+f1.equals(cf1));
    }
}