@@ -19,7 +19,7 @@ class Derived2 extends GenericBase {} // No warning
 //   required: class or interface without bounds
 
 public class ErasureAndInheritance {
-  @SuppressWarnings("unchecked")
+//  @SuppressWarnings("unchecked")
   public static void main(String[] args) {
     Derived2 d2 = new Derived2();
     Object obj = d2.get();
 
@@ -7,7 +7,8 @@
 public class ListMaker<T> {
   List<T> create() { return new ArrayList<>(); }
   public static void main(String[] args) {
-    ListMaker<String> stringMaker = new ListMaker<>();
+//    ListMaker<String> stringMaker = new ListMaker<>();
+    ListMaker<String> stringMaker = new ListMaker<String>();
     List<String> stringList = stringMaker.create();
   }
 }
@@ -1,21 +1,23 @@
-//// generics/Manipulation.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.
-//// {WillNotCompile}
-//
-//class Manipulator<T> {
-//  private T obj;
-//  Manipulator(T x) { obj = x; }
-//  // Error: cannot find symbol: method f():
-//  public void manipulate() { obj.f(); }
-//}
-//
-//public class Manipulation {
-//  public static void main(String[] args) {
-//    HasF hf = new HasF();
-//    Manipulator<HasF> manipulator =
-//      new Manipulator<>(hf);
-//    manipulator.manipulate();
-//  }
-//}
+// generics/Manipulation.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.
+// {WillNotCompile}
+
+class Manipulator<T> {
+  private T obj;
+  Manipulator(T x) { obj = x; }
+  // Error: cannot find symbol: method f():
+  public void manipulate() {
+//      obj.f();
+  }
+}
+
+public class Manipulation {
+  public static void main(String[] args) {
+    HasF hf = new HasF();
+    Manipulator<HasF> manipulator =
+      new Manipulator<>(hf);
+    manipulator.manipulate();
+  }
+}
Original file line number	Diff line number	Diff line change
`@@ -7,7 +7,8 @@`
`7`	`7`	`public class ListMaker<T> {`
`8`	`8`	`List<T> create() { return new ArrayList<>(); }`
`9`	`9`	`public static void main(String[] args) {`
`10`		`- ListMaker<String> stringMaker = new ListMaker<>();`
	`10`	`+// ListMaker<String> stringMaker = new ListMaker<>();`
	`11`	`+ ListMaker<String> stringMaker = new ListMaker<String>();`
`11`	`12`	`List<String> stringList = stringMaker.create();`
`12`	`13`	`}`
`13`	`14`	`}`