Use preferred spelling for "cannot"

src/main/java/org/apache/commons/lang3/JavaVersion.java

@@ -303,7 +303,7 @@ public enum JavaVersion {
      * Parses a float value from a String.
      *
      * @param value the String to parse.
-     * @return the float value represented by the string or -1 if the given String can not be parsed.
+     * @return the float value represented by the string or -1 if the given String cannot be parsed.
      */
     private static float toFloatVersion(final String value) {
         final int defaultReturnValue = -1;

src/main/java/org/apache/commons/lang3/LocaleUtils.java

@@ -256,7 +256,7 @@ public class LocaleUtils {
      *
      * @param str the String to parse as a Locale.
      * @return a Locale parsed from the given String.
-     * @throws IllegalArgumentException if the given String can not be parsed.
+     * @throws IllegalArgumentException if the given String cannot be parsed.
      * @see Locale
      */
     private static Locale parseLocale(final String str) {

src/main/java/org/apache/commons/lang3/Validate.java

@@ -413,14 +413,14 @@ public class Validate {
      *
      * <pre>Validate.isAssignableFrom(SuperClass.class, object.getClass());</pre>
      *
-     * <p>The message of the exception is &quot;The validated object can not be converted to the&quot;
+     * <p>The message of the exception is &quot;The validated object cannot be converted to the&quot;
      * followed by the name of the class and &quot;class&quot;</p>
      *
      * @param superType  the class must be validated against, not null
      * @param type  the class to check, not null
      * @param message  the {@link String#format(String, Object...)} exception message if invalid, not null
      * @param values  the optional values for the formatted exception message, null array not recommended
-     * @throws IllegalArgumentException if argument can not be converted to the specified class
+     * @throws IllegalArgumentException if argument cannot be converted to the specified class
      * @see #isAssignableFrom(Class, Class)
      */
     public static void isAssignableFrom(final Class<?> superType, final Class<?> type, final String message, final Object... values) {

src/main/java/org/apache/commons/lang3/math/Fraction.java

@@ -96,7 +96,7 @@ public final class Fraction extends Number implements Comparable<Fraction> {
      * @param x an addend
      * @param y an addend
      * @return the sum {@code x+y}
-     * @throws ArithmeticException if the result can not be represented as
+     * @throws ArithmeticException if the result cannot be represented as
      * an int
      */
     private static int addAndCheck(final int x, final int y) {
@@ -394,7 +394,7 @@ public final class Fraction extends Number implements Comparable<Fraction> {
      * @param x a factor
      * @param y a factor
      * @return the product {@code x*y}
-     * @throws ArithmeticException if the result can not be represented as
+     * @throws ArithmeticException if the result cannot be represented as
      *                             an int
      */
     private static int mulAndCheck(final int x, final int y) {
@@ -411,7 +411,7 @@ public final class Fraction extends Number implements Comparable<Fraction> {
      * @param x a non-negative factor
      * @param y a non-negative factor
      * @return the product {@code x*y}
-     * @throws ArithmeticException if the result can not be represented as
+     * @throws ArithmeticException if the result cannot be represented as
      * an int
      */
     private static int mulPosAndCheck(final int x, final int y) {
@@ -429,7 +429,7 @@ public final class Fraction extends Number implements Comparable<Fraction> {
      * @param x the minuend
      * @param y the subtrahend
      * @return the difference {@code x-y}
-     * @throws ArithmeticException if the result can not be represented as
+     * @throws ArithmeticException if the result cannot be represented as
      * an int
      */
     private static int subAndCheck(final int x, final int y) {

src/test/java/org/apache/commons/lang3/concurrent/TimedSemaphoreTest.java

@@ -41,7 +41,7 @@ public class TimedSemaphoreTest extends AbstractLangTest {
     /**
      * A test thread class that will be used by tests for triggering the
      * semaphore. The thread calls the semaphore a configurable number of times.
-     * When this is done, it can notify the main thread.
+     * When this is done, it cannotify the main thread.
      */
     private static final class SemaphoreThread extends Thread {
         /** The semaphore. */