// reflection/DynamicSupplier.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.function.*;

import java.util.stream.*;

class ID {

private static long counter;

private final long id = counter++;

@Override public String toString() {

return Long.toString(id);

}

// A public default constructor is required

// to call getConstructor().newInstance():

public ID() {}

}

public class DynamicSupplier<T> implements Supplier<T> {

private Class<T> type;

public DynamicSupplier(Class<T> type) {

this.type = type;

}

@Override public T get() {

try {

return type.getConstructor().newInstance();

} catch(Exception e) {

throw new RuntimeException(e);

}

}

public static void main(String[] args) {

Stream.generate(

new DynamicSupplier<>(ID.class))

.skip(10)

.limit(5)

.forEach(System.out::println);

}

}

/* Output:

10

11

12

13

14

*/