diff --git a/src/java/org/apache/poi/ss/formula/eval/BoolEval.java b/src/java/org/apache/poi/ss/formula/eval/BoolEval.java
index cab4105d0..77a25a361 100644
--- a/src/java/org/apache/poi/ss/formula/eval/BoolEval.java
+++ b/src/java/org/apache/poi/ss/formula/eval/BoolEval.java
@@ -34,7 +34,7 @@ public final class BoolEval implements NumericValueEval, StringValueEval {
 	 *
 	 * @return the <tt>BoolEval</tt> instance representing <tt>b</tt>.
 	 */
-	public static final BoolEval valueOf(boolean b) {
+	public static BoolEval valueOf(boolean b) {
 		return b ? TRUE : FALSE;
 	}
 
@@ -55,10 +55,8 @@ public final class BoolEval implements NumericValueEval, StringValueEval {
 	}
 
 	public String toString() {
-		StringBuilder sb = new StringBuilder(64);
-		sb.append(getClass().getName()).append(" [");
-		sb.append(getStringValue());
-		sb.append("]");
-		return sb.toString();
+		return getClass().getName() + " [" +
+				getStringValue() +
+				"]";
 	}
 }
diff --git a/src/java/org/apache/poi/ss/formula/eval/ErrorEval.java b/src/java/org/apache/poi/ss/formula/eval/ErrorEval.java
index 8e119ea03..e9c228975 100644
--- a/src/java/org/apache/poi/ss/formula/eval/ErrorEval.java
+++ b/src/java/org/apache/poi/ss/formula/eval/ErrorEval.java
@@ -51,7 +51,8 @@ public final class ErrorEval implements ValueEval {
 
     /**
      * Translates an Excel internal error code into the corresponding POI ErrorEval instance
-     * @param errorCode
+     * @param errorCode An error code listed in {@link FormulaError}
+     * @throws RuntimeException If an unknown errorCode is specified
      */
     public static ErrorEval valueOf(int errorCode) {
         FormulaError error = FormulaError.forInt(errorCode);
@@ -89,10 +90,8 @@ public final class ErrorEval implements ValueEval {
         return _error.getString();
     }
     public String toString() {
-        StringBuffer sb = new StringBuffer(64);
-        sb.append(getClass().getName()).append(" [");
-        sb.append(_error.getString());
-        sb.append("]");
-        return sb.toString();
+        return getClass().getName() + " [" +
+                _error.getString() +
+                "]";
     }
 }
diff --git a/src/java/org/apache/poi/ss/formula/eval/ExternalNameEval.java b/src/java/org/apache/poi/ss/formula/eval/ExternalNameEval.java
index f65a3f83d..cd813fb96 100644
--- a/src/java/org/apache/poi/ss/formula/eval/ExternalNameEval.java
+++ b/src/java/org/apache/poi/ss/formula/eval/ExternalNameEval.java
@@ -34,10 +34,8 @@ public final class ExternalNameEval implements ValueEval {
 	}
 
 	public String toString() {
-		StringBuffer sb = new StringBuffer(64);
-		sb.append(getClass().getName()).append(" [");
-		sb.append(_name.getNameText());
-		sb.append("]");
-		return sb.toString();
+		return getClass().getName() + " [" +
+				_name.getNameText() +
+				"]";
 	}
 }
diff --git a/src/java/org/apache/poi/ss/formula/eval/FunctionNameEval.java b/src/java/org/apache/poi/ss/formula/eval/FunctionNameEval.java
index 8a9e48042..82e029639 100644
--- a/src/java/org/apache/poi/ss/formula/eval/FunctionNameEval.java
+++ b/src/java/org/apache/poi/ss/formula/eval/FunctionNameEval.java
@@ -37,10 +37,8 @@ public final class FunctionNameEval implements ValueEval {
 	}
 
 	public String toString() {
-		StringBuffer sb = new StringBuffer(64);
-		sb.append(getClass().getName()).append(" [");
-		sb.append(_functionName);
-		sb.append("]");
-		return sb.toString();
+		return getClass().getName() + " [" +
+				_functionName +
+				"]";
 	}
 }
diff --git a/src/java/org/apache/poi/ss/formula/eval/StringEval.java b/src/java/org/apache/poi/ss/formula/eval/StringEval.java
index 5d3976137..0e35e9dea 100644
--- a/src/java/org/apache/poi/ss/formula/eval/StringEval.java
+++ b/src/java/org/apache/poi/ss/formula/eval/StringEval.java
@@ -45,10 +45,8 @@ public final class StringEval implements StringValueEval {
 	}
 
 	public String toString() {
-		StringBuilder sb = new StringBuilder(64);
-		sb.append(getClass().getName()).append(" [");
-		sb.append(_value);
-		sb.append("]");
-		return sb.toString();
+		return getClass().getName() + " [" +
+				_value +
+				"]";
 	}
 }
diff --git a/src/java/org/apache/poi/ss/formula/functions/LookupUtils.java b/src/java/org/apache/poi/ss/formula/functions/LookupUtils.java
index fce264245..e0bdbedf0 100644
--- a/src/java/org/apache/poi/ss/formula/functions/LookupUtils.java
+++ b/src/java/org/apache/poi/ss/formula/functions/LookupUtils.java
@@ -184,7 +184,7 @@ final class LookupUtils {
 		public static final CompareResult EQUAL = new CompareResult(false, 0);
 		public static final CompareResult GREATER_THAN = new CompareResult(false, +1);
 
-		public static final CompareResult valueOf(int simpleCompareResult) {
+		public static CompareResult valueOf(int simpleCompareResult) {
 			if(simpleCompareResult < 0) {
 				return LESS_THAN;
 			}
@@ -194,7 +194,7 @@ final class LookupUtils {
 			return EQUAL;
 		}
 
-        public static final CompareResult valueOf(boolean matches) {
+        public static CompareResult valueOf(boolean matches) {
             if(matches) {
                 return EQUAL ;
             }
@@ -215,11 +215,9 @@ final class LookupUtils {
 			return _isGreaterThan;
 		}
 		public String toString() {
-			StringBuffer sb = new StringBuffer(64);
-			sb.append(getClass().getName()).append(" [");
-			sb.append(formatAsString());
-			sb.append("]");
-			return sb.toString();
+			return getClass().getName() + " [" +
+					formatAsString() +
+					"]";
 		}
 
 		private String formatAsString() {
@@ -267,11 +265,9 @@ final class LookupUtils {
 			return compareSameType(other);
 		}
 		public String toString() {
-			StringBuffer sb = new StringBuffer(64);
-			sb.append(getClass().getName()).append(" [");
-			sb.append(getValueAsString());
-			sb.append("]");
-			return sb.toString();
+			return getClass().getName() + " [" +
+					getValueAsString() +
+					"]";
 		}
 		protected abstract CompareResult compareSameType(ValueEval other);
 		/** used only for debug purposes */
@@ -475,7 +471,7 @@ final class LookupUtils {
 			// zero is FALSE, everything else is TRUE
 			return 0.0 != nve.getNumberValue();
 		}
-		throw new RuntimeException("Unexpected eval type (" + valEval.getClass().getName() + ")");
+		throw new RuntimeException("Unexpected eval type (" + valEval + ")");
 	}
 
 	public static int lookupIndexOfValue(ValueEval lookupValue, ValueVector vector, boolean isRangeLookup) throws EvaluationException {
diff --git a/src/java/org/apache/poi/ss/formula/functions/Match.java b/src/java/org/apache/poi/ss/formula/functions/Match.java
index 589079e05..9cf38b2e0 100644
--- a/src/java/org/apache/poi/ss/formula/functions/Match.java
+++ b/src/java/org/apache/poi/ss/formula/functions/Match.java
@@ -153,7 +153,7 @@ public final class Match extends Var2or3ArgFunction {
 			// else looks like a number
 			throw new EvaluationException(ErrorEval.NA);
 		}
-		throw new RuntimeException("Unexpected eval type (" + eval.getClass().getName() + ")");
+		throw new RuntimeException("Unexpected eval type (" + eval + ")");
 	}