abstract public class Form { private String farge; public Form(String farge) { this.farge = farge; } public String hentFarge() { return farge; } public void skrivType() { System.out.println("Form"); } @Override public String toString() { return "Form : "+farge; } @Override public boolean equals(Object other) { if (other instanceof Form) { if (((Form) other).hentFarge() == farge) { return true; } } return false; } // equals // Henter ut feks. "l*b" // Gir ikke mening å ta omkrets/areal av en "form" public abstract String hentFormelAreal(); public abstract int areal(); public abstract int omkrets(); }