1 files changed, 14 insertions, 4 deletions
diff --git a/src/org/unitConverter/converterGUI/UnitConverterGUI.java b/src/org/unitConverter/converterGUI/UnitConverterGUI.java
index 867211c..fd40ff4 100755
--- a/src/org/unitConverter/converterGUI/UnitConverterGUI.java
+++ b/src/org/unitConverter/converterGUI/UnitConverterGUI.java
@@ -47,7 +47,7 @@ import javax.swing.ListSelectionModel;
 import org.unitConverter.UnitsDatabase;
 import org.unitConverter.dimension.StandardDimensions;
 import org.unitConverter.dimension.UnitDimension;
-import org.unitConverter.unit.AbstractUnit;
+import org.unitConverter.unit.BaseUnit;
 import org.unitConverter.unit.NonlinearUnits;
 import org.unitConverter.unit.SI;
 import org.unitConverter.unit.Unit;
@@ -143,8 +143,13 @@ final class UnitConverterGUI {
 			this.prefixNamesFiltered = new DelegateListModel<>(new ArrayList<>(this.units.prefixNameSet()));
 			this.prefixNamesFiltered.sort(this.prefixNameComparator); // sorts it using my comparator
 
-			System.out.printf("Successfully loaded %d units (%d base units)", AbstractUnit.getUnitCount(),
-					AbstractUnit.getBaseUnitCount());
+			// a Predicate that returns true iff the argument is a full base unit
+			final Predicate<Unit> isFullBase = unit -> unit instanceof BaseUnit && ((BaseUnit) unit).isFullBase();
+
+			// print out unit counts
+			System.out.printf("Successfully loaded %d units with %d unit names (%d base units).%n",
+					this.units.prefixlessUnitSet().size(), this.units.prefixlessUnitNameSet().size(),
+					this.units.prefixlessUnitSet().stream().filter(isFullBase).count());
 		}
 
 		/**
@@ -162,6 +167,11 @@ final class UnitConverterGUI {
 			final String fromUnitString = this.view.getFromText();
 			final String toUnitString = this.view.getToText();
 
+			if (fromUnitString.isEmpty()) {
+				this.view.showErrorDialog("Parse Error", "Please enter a unit expression in the From: box.");
+				return;
+			}
+
 			// try to parse from
 			final Unit from;
 			try {
@@ -175,8 +185,8 @@ final class UnitConverterGUI {
 			// try to parse to
 			final Unit to;
 			try {
-				// if it's a unit, convert to that
 				if (this.units.containsUnitName(toUnitString)) {
+					// if it's a unit, convert to that
 					to = this.units.getUnit(toUnitString);
 				} else {
 					to = this.units.getUnitFromExpression(toUnitString);