OnJava8-Examples/generics/GenericVarargs.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// generics/GenericVarargs.java

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

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

import java.util.*;

public class GenericVarargs {

@SafeVarargs

public static <T> List<T> makeList(T... args) {

List<T> result = new ArrayList<>();

for(T item : args)

result.add(item);

return result;

}

public static void main(String[] args) {

List<String> ls = makeList("A");

System.out.println(ls);

ls = makeList("A", "B", "C");

System.out.println(ls);

ls = makeList(

"ABCDEFFHIJKLMNOPQRSTUVWXYZ".split(""));

System.out.println(ls);

}

/* Output:

[A]

[A, B, C]

[A, B, C, D, E, F, F, H, I, J, K, L, M, N, O, P, Q, R,

S, T, U, V, W, X, Y, Z]