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AmericanExpress.java

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package net.threebit.utils.sosc ; 

public class AmericanExpress extends CreditCard
{    
    public AmericanExpress(final String americanexpress)
    {        
        super(americanexpress, "AmericanExpress");
    }

        public boolean equals(final Object o)
    {
       if (!(o instanceof AmericanExpress))
       {
           return (false);
       }
       return (super.equals(o));
    }

    protected boolean checkSize()
    {                
        return(15 == (number.length()));
    }
    
    protected boolean checkPrefix()
    {
        final int prefix;
        prefix = (((number.charAt(0) - '0') * 10) + (number.charAt(1) - '0')); 
        return ((prefix == 37) || (prefix == 34));
    }
    
    public static boolean validate(String num)
    {
         return(new AmericanExpress(num).validate());
    }
}

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