BAEL-376 - simplifying

core-java/src/main/java/com/baeldung/generics/Generics.java

@@ -3,27 +3,24 @@ package com.baeldung.generics;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.stream.Collectors;
 
 public class Generics {
 
 	// definition of a generic method
 	public static <T> List<T> fromArrayToList(T[] a) {
-		List<T> list = new ArrayList<>();
-		Arrays.stream(a).forEach(list::add);
-		return list;
+		return Arrays.stream(a).collect(Collectors.toList());
 	}
 
 	// example of a generic method that has Number as an upper bound for T
 	public static <T extends Number> List<T> fromArrayToListWithUpperBound(T[] a) {
-		List<T> list = new ArrayList<>();
-		Arrays.stream(a).forEach(list::add);
-		return list;
+		return Arrays.stream(a).collect(Collectors.toList());
 	}
 
 	// example of a generic method with a wild card, this method can be used
 	// with a list of any subtype of Building
 	public static boolean paintAllBuildings(List<? extends Building> buildings) {
-		buildings.stream().forEach(Building::paint);
+		buildings.forEach(Building::paint);
 		return true;
 	}