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BAEL-367 - Simplyfing code

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slavisa-baeldung 2016-12-05 10:59:53 +01:00
parent aba015e1ad
commit 4f4782255a
2 changed files with 3 additions and 5 deletions
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5
core-java/src/main/java/com/baeldung/generics/Generics.java
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@ -13,9 +13,8 @@ public class Generics {
} }
// definition of a generic method // definition of a generic method
public static <T, G> List<G> fromArrayToList(T[] a, List<G> list, Function<T, G> mapperFunction) { public static <T, G> List<G> fromArrayToList(T[] a, Function<T, G> mapperFunction) {
List<T> listWithTypeT = Arrays.stream(a).collect(Collectors.toList()); return Arrays.stream(a).map(mapperFunction).collect(Collectors.toList());
return listWithTypeT.stream().map(mapperFunction).collect(Collectors.toList());
} }
// example of a generic method that has Number as an upper bound for T // example of a generic method that has Number as an upper bound for T

3
core-java/src/test/java/com/baeldung/generics/GenericsTest.java
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@ -24,8 +24,7 @@ public class GenericsTest {
@Test @Test
public void givenArrayOfIntegers_thanListOfStringReturnedOK() { public void givenArrayOfIntegers_thanListOfStringReturnedOK() {
Integer[] intArray = { 1, 2, 3, 4, 5 }; Integer[] intArray = { 1, 2, 3, 4, 5 };
List<String> stringList = new ArrayList<>(); List<String> stringList = Generics.fromArrayToList(intArray, Object::toString);
stringList = Generics.fromArrayToList(intArray, stringList, Object::toString);
assertThat(stringList, hasItems("1", "2", "3", "4", "5")); assertThat(stringList, hasItems("1", "2", "3", "4", "5"));
} }