diff --git a/docs/manual/CoreTasks/exec.html b/docs/manual/CoreTasks/exec.html
index 274d6c69c..77002c01a 100644
--- a/docs/manual/CoreTasks/exec.html
+++ b/docs/manual/CoreTasks/exec.html
@@ -56,7 +56,7 @@ the job table (see the <i>JDK Release Notes</i>).</p>
 
 <p>Please note that the Java VM provided by HP doesn't follow OpenVMS'
 conventions of exit codes.  If you run a Java VM with this task, the
-task may falsely claim that an error occured (or silently ignore an
+task may falsely claim that an error occurred (or silently ignore an
 error).  Don't use this task to run <code>JAVA.EXE</code>, use a
 <code>&lt;java&gt;</code> task with the <code>fork</code> attribute
 set to <code>true</code> instead as this task will follow the VM's
diff --git a/docs/manual/CoreTypes/selectors-program.html b/docs/manual/CoreTypes/selectors-program.html
index b471e0822..959280bdf 100755
--- a/docs/manual/CoreTypes/selectors-program.html
+++ b/docs/manual/CoreTypes/selectors-program.html
@@ -161,7 +161,7 @@
     BaseSelectorTest provides the method <tt>performTests()</tt> which
     iterates over all files (and directories) in the String array <tt>filenames</tt>
     and checks whether the given selector returns the expected result. If an error
-    occured (especially the selector does not return the expected result) the test
+    occurred (especially the selector does not return the expected result) the test
     fails and the failing filenames are logged.</p>
 
     <p>An example test would be:<pre>
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/junit/JUnitTestRunner.java b/src/main/org/apache/tools/ant/taskdefs/optional/junit/JUnitTestRunner.java
index 946487c14..679966ea6 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/junit/JUnitTestRunner.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/junit/JUnitTestRunner.java
@@ -593,8 +593,8 @@ public class JUnitTestRunner implements TestListener {
                     new java.io.BufferedReader(new java.io.FileReader(args[0]));
                 String testCaseName;
                 int code = 0;
-                boolean errorOccured = false;
-                boolean failureOccured = false;
+                boolean errorOccurred = false;
+                boolean failureOccurred = false;
                 String line = null;
                 while ((line = reader.readLine()) != null) {
                     StringTokenizer st = new StringTokenizer(line, ",");
@@ -604,11 +604,11 @@ public class JUnitTestRunner implements TestListener {
                     t.setOutfile(st.nextToken());
                     code = launch(t, haltError, stackfilter, haltFail,
                                   showOut, logTestListenerEvents, props);
-                    errorOccured = (code == ERRORS);
-                    failureOccured = (code != SUCCESS);
-                    if (errorOccured || failureOccured) {
-                        if ((errorOccured && haltError)
-                            || (failureOccured && haltFail)) {
+                    errorOccurred = (code == ERRORS);
+                    failureOccurred = (code != SUCCESS);
+                    if (errorOccurred || failureOccurred) {
+                        if ((errorOccurred && haltError)
+                            || (failureOccurred && haltFail)) {
                             registerNonCrash(noCrashFile);
                             System.exit(code);
                         } else {
diff --git a/src/main/org/apache/tools/ant/util/Watchdog.java b/src/main/org/apache/tools/ant/util/Watchdog.java
index ded57673d..e277a1427 100644
--- a/src/main/org/apache/tools/ant/util/Watchdog.java
+++ b/src/main/org/apache/tools/ant/util/Watchdog.java
@@ -62,7 +62,7 @@ public class Watchdog implements Runnable {
     }
 
     /**
-     * Inform the observers that a timeout has occured.
+     * Inform the observers that a timeout has occurred.
      */
     protected final void fireTimeoutOccured() {
         Enumeration e = observers.elements();
diff --git a/src/testcases/org/apache/tools/ant/BuildFileTest.java b/src/testcases/org/apache/tools/ant/BuildFileTest.java
index 565b8f108..062aef263 100644
--- a/src/testcases/org/apache/tools/ant/BuildFileTest.java
+++ b/src/testcases/org/apache/tools/ant/BuildFileTest.java
@@ -431,7 +431,7 @@ public abstract class BuildFileTest extends TestCase {
 
         /**
          *  Fired after the last target has finished. This event
-         *  will still be thrown if an error occured during the build.
+         *  will still be thrown if an error occurred during the build.
          *
          *  @see BuildEvent#getException()
          */
@@ -449,7 +449,7 @@ public abstract class BuildFileTest extends TestCase {
 
         /**
          *  Fired when a target has finished. This event will
-         *  still be thrown if an error occured during the build.
+         *  still be thrown if an error occurred during the build.
          *
          *  @see BuildEvent#getException()
          */
@@ -468,7 +468,7 @@ public abstract class BuildFileTest extends TestCase {
 
         /**
          *  Fired when a task has finished. This event will still
-         *  be throw if an error occured during the build.
+         *  be throw if an error occurred during the build.
          *
          *  @see BuildEvent#getException()
          */