Javadoc spelling

src/main/java/org/apache/commons/jexl3/JexlArithmetic.java

@@ -951,7 +951,7 @@ public Object controlReturn(final Object returned) {
     /**
      * Given a Number, return the value using the smallest type the result
      * will fit into.
-     * <p>This works hand in hand with parameter 'widening' in java
+     * <p>This works hand in hand with parameter 'widening' in Java
      * method calls, e.g. a call to substring(int,int) with an int and a long
      * will fail, but a call to substring(int,int) with an int and a short will
      * succeed.</p>

src/main/java/org/apache/commons/jexl3/JexlBuilder.java

@@ -669,7 +669,7 @@ public int cacheThreshold() {
 
     /**
      * Sets the number of script/expression evaluations that can be stacked.
-     * @param size if not strictly positive, limit is reached when java StackOverflow is thrown.
+     * @param size if not strictly positive, limit is reached when Java StackOverflow is thrown.
      * @return this builder
      */
     public JexlBuilder stackOverflow(final int size) {

src/main/java/org/apache/commons/jexl3/internal/introspection/ClassTool.java

@@ -56,7 +56,7 @@ final class ClassTool {
     }
 
     /**
-     * Checks whether a class is exported by its module (java 9+).
+     * Checks whether a class is exported by its module (Java 9+).
      * The code performs the following sequence through reflection (since the same jar can run
      * on a Java8 or Java9+ runtime and the module features does not exist on 8).
      * <code>

src/test/java/org/apache/commons/jexl3/ClassCreator.java

@@ -45,7 +45,7 @@ public class ClassCreator {
     static final String GEN_PATH = "/" + GEN_PACKAGE.replace(".", "/");///org/apache/commons/jexl3/generated";
     static final String GEN_CLASS = GEN_PACKAGE + ".";
     /**
-     * Check if we can invoke Sun's java compiler.
+     * Check if we can invoke Sun's Java compiler.
      *
      * @return true if it is possible, false otherwise
      */