fix typos

ChrisMayfield · ChrisMayfield · commit c9f227aa3658 · 2019-10-08T19:34:09.000-04:00
diff --git a/ch06/Strings.java b/ch06/Strings.java
@@ -1,5 +1,5 @@
 /**
- * Demonstates uses of Strings.
+ * Demonstrates uses of Strings.
  */
 public class Strings {
 
diff --git a/ch09/Objects.java b/ch09/Objects.java
@@ -1,7 +1,7 @@
 import java.math.BigInteger;
 
 /**
- * Demonstates uses of objects and wrappers.
+ * Demonstrates uses of objects and wrappers.
  */
 public class Objects {
 
@@ -24,8 +24,8 @@ public static void main(String[] args) {
 
         // Wrapper classes
 
-        Integer x = new Integer(123);
-        Integer y = new Integer(123);
+        Integer x = Integer.valueOf(123);
+        Integer y = Integer.valueOf(123);
         if (x == y) {                           // false
             System.out.println("x and y are the same object");
         }
diff --git a/ch10/PointRect.java b/ch10/PointRect.java
@@ -2,7 +2,7 @@
 import java.awt.Rectangle;
 
 /**
- * Demonstates use of Point and Rectangle classes.
+ * Demonstrates use of Point and Rectangle classes.
  */
 public class PointRect {
 
