Learning DesignPatterns: The Factory Method Pattern

"The Factory method pattern defines a separate method for creating the objects, which subclasses can then override to specify the derived type of product that will be created"

Example

/** Abstract class for melting temperature calculation */
abstract class TmCalculator
{
public abstract double calcTm(CharSequence s);
}

/** the factory creates two kinds of TmCalculator
1) 2AT4GC
2) Nearest-Neighbor
*/
public class TmCalculatorFactory
{
public TmCalculator create2AT4GC()
{
return new TmCalculator()
{
@Override
public double calcTm(CharSequence s)
{
(...implements ... )
}
};
}

public TmCalculator createNearestNeighbor()
{
return new TmCalculator()
{
@Override
public double calcTm(CharSequence s)
{
(...implements ... )
}
};
}
}

That's it

Pierre