Mon objet ….
public class MyObject { String description ; public MyObject(String s) { description = s ; } // end - MyObject public String toString() { return "MyObject: " + description ; } // end - toString public boolean equals(Object o) { if ( ! (o instanceof MyObject) ) return false ; MyObject mo = (MyObject) o ; return mo.description.equals(this.description) ; } // end - equals } // end - class