public boolean equals(Object o) { if (!(o instanceof MyClass)) return false;
MyClass c = (MyClass) o;
return name.equals(c.name);
}
}
class EqualityDemo { public static void main(String[] args) {
MyClass c1 = new MyClass("S");
MyClass c2 = new MyClass("S");
MyClass c3 = new MyClass("M");