fix Swing-based stuff too

Author: andrewcmyers

lectures/gui_swing/index.html

@@ -6,7 +6,7 @@ <h1>Graphical User Interfaces: Display and Layout</h1>
 </p>
 <p>
 In fact, the standard WIMP model of graphical user interfaces (Windows, Icons,
-Menus, Pointer) was developed at Xerox PARC during the 1970's in and along with
+Menus, Pointer) was developed at Xerox PARC during the 1970's along with
 one of the first object-oriented programming languages, Smalltalk. GUIs
 influenced the language design and vice versa. The WIMP model first saw
 widespread deployment by Apple with the first Macintosh computer and was
@@ -110,7 +110,7 @@ <h2>Building a GUI</h2>
 <pre>
 JComponent parent = ...;
 JComponent child = ...;
-p.add(child);
+parent.add(child);
 </pre>
 <p>
 The method <code>getComponents()</code> returns an array of the child components
@@ -119,7 +119,7 @@ <h2>Building a GUI</h2>
 <h2>GUI Designers</h2>
 <p>
 Support for GUI design is built into various IDEs, such as NetBeans or IntelliJ
-IDEA. For example, IntelliJ has a GUI Designer for this purposes.  These design
+IDEA. For example, IntelliJ has a GUI Designer for this purpose.  These design
 applications give you a user interface to design GUIs and save them into an
 external file in XML format that can be read in later by an application to set
 up its component tree and to connect it to application code.
@@ -183,7 +183,7 @@ <h2>Threads</h2>
 <p>
 Unlike simple Java programs, a Swing application typically has multiple
 concurrent threads: a <strong>main thread</strong>, an <strong>event dispatch
-thread</strong>, and optionally more threads that do computation n the
+thread</strong>, and optionally more threads that do computation in the
 background. The job of the event dispatch thread is to loop continuously,
 listening for the occurrence of hardware-generated events such as mouse clicks.
 For each such occurrence, it constructs an event object describing the event

lectures/guievents_swing/index.html

@@ -100,7 +100,7 @@ <h3>Using background threads with Swing</h3>
 called by the task thread.
 </p>
 <p>
-To report progress back to other threads;
+To report progress back to other threads,
 the worker thread may call <code>setProgress()</code>; they can observe the
 progress report by calling <code>getProgress()</code>.
 When the task completes by returning