When one has the IDE generate an equals method, it spits out something like this:
@Override
public boolean equals(Object obj) {
	if (obj == null) {
		return false;
	}
	if (getClass() != obj.getClass()) {
		return false;
	}
	final Foo other = (Foo) obj;
	if (this.bar != other.bar) {
		return false;
	}
	return true;
}

I noticed that it is missing a comparison to "this", in other words:
if (this == obj)
    return true;
This could save processor time comparing members if the programmer doesn't add it themselves