package chapter4;

import java.util.function.Function;

import java.util.ArrayList;

public class NumberParser

{

private static <Y extends Number> Y parse(String x,

Function<String, Y> f)

{

return f.apply(x);

}

public static void main(String[] args)

{

ArrayList< Function<String,? extends Number> > list

= new ArrayList<>();

list.add(x -> Byte.parseByte(x));

list.add(x -> Short.parseShort(x));

list.add(x -> Integer.parseInt(x));

list.add(x -> Long.parseLong(x));

list.add(x -> Float.parseFloat(x));

list.add(x -> Double.parseDouble(x));

String[] numbers = {"10", "20", "30", "40", "50", "60"};

Number[] results = new Number[numbers.length];

for (int i=0; i < numbers.length; ++i)

{

results[i] = parse(numbers[i], list.get(i));

System.out.println(results[i]);

}

}

}