BAEL-2562 New section in Generics article

agnaveen · Mar 13, 2019 · bde5b5f · bde5b5f
1 parent 94917d8
commit bde5b5f
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diff --git a/core-java-lang-syntax/src/main/java/com/baeldung/generics/Generics.java b/core-java-lang-syntax/src/main/java/com/baeldung/generics/Generics.java
@@ -1,5 +1,6 @@
 package com.baeldung.generics;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.function.Function;
@@ -28,4 +29,10 @@ public static void paintAllBuildings(List<? extends Building> buildings) {
         buildings.forEach(Building::paint);
     }
 
+    public static List<Integer> createList(int a) {
+        List<Integer> list = new ArrayList<>();
+        list.add(a);
+        return list;
+    }
+
 }
diff --git a/core-java-lang-syntax/src/test/java/com/baeldung/generics/GenericsUnitTest.java b/core-java-lang-syntax/src/test/java/com/baeldung/generics/GenericsUnitTest.java
@@ -6,6 +6,7 @@
 import java.util.List;
 
 import static org.hamcrest.CoreMatchers.hasItems;
+import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.Assert.fail;
 
@@ -66,4 +67,12 @@ public void givenSubTypeOfWildCardBoundedGenericType_thanPaintingOK() {
         }
     }
 
+    @Test
+    public void givenAnInt_whenAddedToAGenericIntegerList_thenAListItemCanBeAssignedToAnInt() {
+        int number = 7;
+        List<Integer> list = Generics.createList(number);
+        int otherNumber = list.get(0);
+        assertThat(otherNumber, is(number));
+    }
+
 }