A definition of Key suitable for object serialization.
- By Huw Evans
- September 12, 2000
JAVA PRIMERUsing Java Object Serialization: A Few Pitfalls
Huw Evans
Listing 4. A definition of Key suitable for object serialization.
public class ObjId
{
private static int ctr = 0;
public static int allocate()
{
return ++ctr;
}
}
public class Key implements java.io.Serializable
{
int obj_id;
public Key()
{
obj_id = ObjId.allocate();
}
public String toString()
{
return "I am a Key";
}
public int hashCode()
{
return obj_id;
}
public boolean equals(Object o)
{
return obj_id == ((Key) o).obj_id;
}
}