diff --git a/app/src/main/java/org/solovyev/android/calculator/AndroidNumeralBase.java b/app/src/main/java/org/solovyev/android/calculator/AndroidNumeralBase.java
index c71d425f..5ac49236 100644
--- a/app/src/main/java/org/solovyev/android/calculator/AndroidNumeralBase.java
+++ b/app/src/main/java/org/solovyev/android/calculator/AndroidNumeralBase.java
@@ -23,19 +23,16 @@
 package org.solovyev.android.calculator;
 
 import android.app.Activity;
-
+import jscl.NumeralBase;
+import org.solovyev.android.calculator.units.CalculatorNumeralBase;
 import org.solovyev.android.views.dragbutton.DirectionDragButton;
 import org.solovyev.android.views.dragbutton.DragDirection;
-import org.solovyev.android.calculator.units.CalculatorNumeralBase;
 
+import javax.annotation.Nonnull;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-import javax.annotation.Nonnull;
-
-import jscl.NumeralBase;
-
 /**
  * User: serso
  * Date: 4/21/12
@@ -95,7 +92,7 @@ public enum AndroidNumeralBase {
     @Nonnull
     private final CalculatorNumeralBase calculatorNumeralBase;
 
-    private AndroidNumeralBase(@Nonnull CalculatorNumeralBase calculatorNumeralBase) {
+    AndroidNumeralBase(@Nonnull CalculatorNumeralBase calculatorNumeralBase) {
         this.calculatorNumeralBase = calculatorNumeralBase;
     }
 
diff --git a/app/src/main/java/org/solovyev/android/calculator/CalculatorEventContainer.java b/app/src/main/java/org/solovyev/android/calculator/CalculatorEventContainer.java
index 69922286..4d550832 100644
--- a/app/src/main/java/org/solovyev/android/calculator/CalculatorEventContainer.java
+++ b/app/src/main/java/org/solovyev/android/calculator/CalculatorEventContainer.java
@@ -42,7 +42,7 @@ public interface CalculatorEventContainer {
 
     void fireCalculatorEvents(@Nonnull List<CalculatorEvent> calculatorEvents);
 
-    public static class CalculatorEvent {
+    class CalculatorEvent {
 
         @Nonnull
         private CalculatorEventData calculatorEventData;
diff --git a/app/src/main/java/org/solovyev/android/calculator/CalculatorEventDataImpl.java b/app/src/main/java/org/solovyev/android/calculator/CalculatorEventDataImpl.java
index 788f5db9..cc7c9a7a 100644
--- a/app/src/main/java/org/solovyev/android/calculator/CalculatorEventDataImpl.java
+++ b/app/src/main/java/org/solovyev/android/calculator/CalculatorEventDataImpl.java
@@ -75,10 +75,7 @@ class CalculatorEventDataImpl implements CalculatorEventData {
         if (this.sequenceId == NO_SEQUENCE) {
             return false;
         }
-        if (this.sequenceId == that.getSequenceId()) {
-            return true;
-        }
-        return false;
+        return this.sequenceId == that.getSequenceId();
     }
 
     @Override
@@ -86,10 +83,7 @@ class CalculatorEventDataImpl implements CalculatorEventData {
         if (this.sequenceId == NO_SEQUENCE) {
             return false;
         }
-        if (this.sequenceId > that.getSequenceId()) {
-            return true;
-        }
-        return false;
+        return this.sequenceId > that.getSequenceId();
     }
 
     @Override
@@ -100,9 +94,8 @@ class CalculatorEventDataImpl implements CalculatorEventData {
         CalculatorEventDataImpl that = (CalculatorEventDataImpl) o;
 
         if (eventId != that.eventId) return false;
-        if (sequenceId != that.sequenceId) return false;
+        return sequenceId == that.sequenceId;
 
-        return true;
     }
 
     @Override
diff --git a/app/src/main/java/org/solovyev/android/calculator/CalculatorFragmentType.java b/app/src/main/java/org/solovyev/android/calculator/CalculatorFragmentType.java
index e4a984f1..92c6dbbf 100644
--- a/app/src/main/java/org/solovyev/android/calculator/CalculatorFragmentType.java
+++ b/app/src/main/java/org/solovyev/android/calculator/CalculatorFragmentType.java
@@ -75,9 +75,9 @@ public enum CalculatorFragmentType {
     private Class<? extends Fragment> fragmentClass;
     private int defaultTitleResId;
 
-    private CalculatorFragmentType(@Nonnull Class<? extends Fragment> fragmentClass,
-                                   int defaultLayoutId,
-                                   int defaultTitleResId) {
+    CalculatorFragmentType(@Nonnull Class<? extends Fragment> fragmentClass,
+                           int defaultLayoutId,
+                           int defaultTitleResId) {
         this.fragmentClass = fragmentClass;
         this.defaultLayoutId = defaultLayoutId;
         this.defaultTitleResId = defaultTitleResId;
diff --git a/app/src/main/java/org/solovyev/android/calculator/CalculatorMenu.java b/app/src/main/java/org/solovyev/android/calculator/CalculatorMenu.java
index 3c7d1172..d8cd1057 100644
--- a/app/src/main/java/org/solovyev/android/calculator/CalculatorMenu.java
+++ b/app/src/main/java/org/solovyev/android/calculator/CalculatorMenu.java
@@ -87,7 +87,7 @@ enum CalculatorMenu implements LabeledMenuItem<MenuItem> {
 
     private final int captionResId;
 
-    private CalculatorMenu(int captionResId) {
+    CalculatorMenu(int captionResId) {
         this.captionResId = captionResId;
     }
 
diff --git a/app/src/main/java/org/solovyev/android/calculator/model/MathEntityBuilder.java b/app/src/main/java/org/solovyev/android/calculator/model/MathEntityBuilder.java
index 632efd7c..55fe14a3 100644
--- a/app/src/main/java/org/solovyev/android/calculator/model/MathEntityBuilder.java
+++ b/app/src/main/java/org/solovyev/android/calculator/model/MathEntityBuilder.java
@@ -36,11 +36,11 @@ import javax.annotation.Nullable;
 public interface MathEntityBuilder<T extends MathEntity> extends JBuilder<T> {
 
     @Nonnull
-    public MathEntityBuilder<T> setName(@Nonnull String name);
+    MathEntityBuilder<T> setName(@Nonnull String name);
 
     @Nonnull
-    public MathEntityBuilder<T> setDescription(@Nullable String description);
+    MathEntityBuilder<T> setDescription(@Nullable String description);
 
     @Nonnull
-    public MathEntityBuilder<T> setValue(@Nullable String value);
+    MathEntityBuilder<T> setValue(@Nullable String value);
 }
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/AbstractCalculatorPlotFragment.java b/app/src/main/java/org/solovyev/android/calculator/plot/AbstractCalculatorPlotFragment.java
index a7171f7a..2736a287 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/AbstractCalculatorPlotFragment.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/AbstractCalculatorPlotFragment.java
@@ -407,7 +407,7 @@ public abstract class AbstractCalculatorPlotFragment extends CalculatorFragment
         return super.onOptionsItemSelected(item) || fragmentMenu.onOptionsItemSelected(this.getActivity(), item);
     }
 
-    private static enum PlotMenu implements IdentifiableMenuItem<MenuItem> {
+    private enum PlotMenu implements IdentifiableMenuItem<MenuItem> {
 
         functions(R.id.menu_plot_functions) {
             @Override
@@ -425,7 +425,7 @@ public abstract class AbstractCalculatorPlotFragment extends CalculatorFragment
 
         private final int itemId;
 
-        private PlotMenu(int itemId) {
+        PlotMenu(int itemId) {
             this.itemId = itemId;
         }
 
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotterImpl.java b/app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotterImpl.java
index 6b976f17..62a7524b 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotterImpl.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotterImpl.java
@@ -325,11 +325,7 @@ public class CalculatorPlotterImpl implements CalculatorPlotter {
             maxArity = Math.max(maxArity, xyFunction.getArity());
         }
 
-        if (maxArity > 1) {
-            plot3d = true;
-        } else {
-            plot3d = false;
-        }
+        plot3d = maxArity > 1;
 
         if (functions.isEmpty()) {
             // no functions => new plot => default boundaries
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/GraphView.java b/app/src/main/java/org/solovyev/android/calculator/plot/GraphView.java
index 12b9874f..a809d554 100755
--- a/app/src/main/java/org/solovyev/android/calculator/plot/GraphView.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/GraphView.java
@@ -31,21 +31,21 @@ import javax.annotation.Nonnull;
 
 public interface GraphView extends ZoomButtonsController.OnZoomListener, TouchHandler.TouchHandlerListener {
 
-    public void init(@Nonnull PlotViewDef plotViewDef);
+    void init(@Nonnull PlotViewDef plotViewDef);
 
     @Nonnull
-    public List<PlotFunction> getPlotFunctions();
+    List<PlotFunction> getPlotFunctions();
 
-    public void setPlotFunctions(@Nonnull List<PlotFunction> plotFunctions);
+    void setPlotFunctions(@Nonnull List<PlotFunction> plotFunctions);
 
-    public void onDestroy();
+    void onDestroy();
 
-    public void onPause();
+    void onPause();
 
-    public void onResume();
+    void onResume();
 
     @Nonnull
-    public Bitmap captureScreenshot();
+    Bitmap captureScreenshot();
 
     void setXRange(float xMin, float xMax);
 
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/PlotBoundaries.java b/app/src/main/java/org/solovyev/android/calculator/plot/PlotBoundaries.java
index 487a4b19..4092821b 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/PlotBoundaries.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/PlotBoundaries.java
@@ -109,9 +109,8 @@ public final class PlotBoundaries implements Serializable {
         if (Float.compare(that.xMax, xMax) != 0) return false;
         if (Float.compare(that.xMin, xMin) != 0) return false;
         if (Float.compare(that.yMax, yMax) != 0) return false;
-        if (Float.compare(that.yMin, yMin) != 0) return false;
+        return Float.compare(that.yMin, yMin) == 0;
 
-        return true;
     }
 
     @Override
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/PlotFunction.java b/app/src/main/java/org/solovyev/android/calculator/plot/PlotFunction.java
index 2932b380..a526fba3 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/PlotFunction.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/PlotFunction.java
@@ -124,9 +124,8 @@ public class PlotFunction {
 
         PlotFunction that = (PlotFunction) o;
 
-        if (!xyFunction.equals(that.xyFunction)) return false;
+        return xyFunction.equals(that.xyFunction);
 
-        return true;
     }
 
     @Override
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineColor.java b/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineColor.java
index a070b037..400f5d44 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineColor.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineColor.java
@@ -47,7 +47,7 @@ public enum PlotLineColor {
 
     private final int color;
 
-    private PlotLineColor(int color) {
+    PlotLineColor(int color) {
         this.color = color;
     }
 
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineColorType.java b/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineColorType.java
index 6479e80f..68e6d7f9 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineColorType.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineColorType.java
@@ -30,5 +30,5 @@ package org.solovyev.android.calculator.plot;
 public enum PlotLineColorType {
 
     monochrome,
-    color_map;
+    color_map
 }
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineDef.java b/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineDef.java
index 9e05cb5e..161eee9d 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineDef.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineDef.java
@@ -171,9 +171,8 @@ public class PlotLineDef {
         if (lineColor != that.lineColor) return false;
         if (Float.compare(that.lineWidth, lineWidth) != 0) return false;
         if (lineColorType != that.lineColorType) return false;
-        if (lineStyle != that.lineStyle) return false;
+        return lineStyle == that.lineStyle;
 
-        return true;
     }
 
     @Override
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineStyle.java b/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineStyle.java
index 57fc0b69..238bb41d 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineStyle.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/PlotLineStyle.java
@@ -33,6 +33,6 @@ public enum PlotLineStyle {
     solid,
     dashed,
     dotted,
-    dash_dotted;
+    dash_dotted
 
 }
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/TouchHandler.java b/app/src/main/java/org/solovyev/android/calculator/plot/TouchHandler.java
index 6b54a199..ba4e8896 100755
--- a/app/src/main/java/org/solovyev/android/calculator/plot/TouchHandler.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/TouchHandler.java
@@ -104,7 +104,7 @@ class TouchHandler {
         return velocityTracker.getYVelocity();
     }
 
-    static interface TouchHandlerListener {
+    interface TouchHandlerListener {
         void onTouchDown(float x, float y);
 
         void onTouchMove(float x, float y);
diff --git a/app/src/main/java/org/solovyev/android/calculator/plot/XyFunction.java b/app/src/main/java/org/solovyev/android/calculator/plot/XyFunction.java
index 652593b7..227d1e35 100644
--- a/app/src/main/java/org/solovyev/android/calculator/plot/XyFunction.java
+++ b/app/src/main/java/org/solovyev/android/calculator/plot/XyFunction.java
@@ -22,14 +22,13 @@
 
 package org.solovyev.android.calculator.plot;
 
+import jscl.math.Generic;
+import jscl.math.function.Constant;
 import org.solovyev.common.text.Strings;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
-import jscl.math.Generic;
-import jscl.math.function.Constant;
-
 public class XyFunction implements FunctionEvaluator {
 
 	/*
@@ -156,9 +155,8 @@ public class XyFunction implements FunctionEvaluator {
 
         final XyFunction that = (XyFunction) o;
 
-        if (!id.equals(that.id)) return false;
+        return id.equals(that.id);
 
-        return true;
     }
 
     @Override
diff --git a/app/src/main/java/org/solovyev/android/calculator/units/CalculatorNumeralBase.java b/app/src/main/java/org/solovyev/android/calculator/units/CalculatorNumeralBase.java
index dbed130c..9a04408a 100644
--- a/app/src/main/java/org/solovyev/android/calculator/units/CalculatorNumeralBase.java
+++ b/app/src/main/java/org/solovyev/android/calculator/units/CalculatorNumeralBase.java
@@ -54,7 +54,7 @@ public enum CalculatorNumeralBase implements UnitType<String> {
     @Nonnull
     private final NumeralBase numeralBase;
 
-    private CalculatorNumeralBase(@Nonnull NumeralBase numeralBase) {
+    CalculatorNumeralBase(@Nonnull NumeralBase numeralBase) {
         this.numeralBase = numeralBase;
     }
 
diff --git a/app/src/main/java/org/solovyev/android/calculator/variables/CppVariable.java b/app/src/main/java/org/solovyev/android/calculator/variables/CppVariable.java
index ce6f0abd..07a23a2e 100644
--- a/app/src/main/java/org/solovyev/android/calculator/variables/CppVariable.java
+++ b/app/src/main/java/org/solovyev/android/calculator/variables/CppVariable.java
@@ -132,9 +132,8 @@ public class CppVariable implements Jsonable, Parcelable {
         CppVariable that = (CppVariable) o;
 
         if (id != that.id) return false;
-        if (!name.equals(that.name)) return false;
+        return name.equals(that.name);
 
-        return true;
     }
 
     @Override
diff --git a/app/src/main/java/org/solovyev/android/calculator/view/UnitConverterViewBuilder.java b/app/src/main/java/org/solovyev/android/calculator/view/UnitConverterViewBuilder.java
index 449e70ec..aad83dbd 100644
--- a/app/src/main/java/org/solovyev/android/calculator/view/UnitConverterViewBuilder.java
+++ b/app/src/main/java/org/solovyev/android/calculator/view/UnitConverterViewBuilder.java
@@ -232,7 +232,7 @@ public class UnitConverterViewBuilder implements ViewBuilder<View> {
         spinner.setAdapter(adapter);
     }
 
-    public static interface CustomButtonOnClickListener {
+    public interface CustomButtonOnClickListener {
         void onClick(@Nonnull Unit<String> fromUnits, @Nonnull Unit<String> toUnits);
     }
 
diff --git a/app/src/main/java/org/solovyev/android/calculator/wizard/DragButtonWizardStep.java b/app/src/main/java/org/solovyev/android/calculator/wizard/DragButtonWizardStep.java
index 3c33defb..1a90d09c 100644
--- a/app/src/main/java/org/solovyev/android/calculator/wizard/DragButtonWizardStep.java
+++ b/app/src/main/java/org/solovyev/android/calculator/wizard/DragButtonWizardStep.java
@@ -131,7 +131,7 @@ public class DragButtonWizardStep extends WizardFragment {
         }
     }
 
-    private static enum DragButtonAction {
+    private enum DragButtonAction {
         center(R.string.cpp_wizard_dragbutton_action_center, null),
         up(R.string.cpp_wizard_dragbutton_action_up, DragDirection.up),
         down(R.string.cpp_wizard_dragbutton_action_down, DragDirection.down),
diff --git a/app/src/main/java/org/solovyev/android/sherlock/FragmentItem.java b/app/src/main/java/org/solovyev/android/sherlock/FragmentItem.java
index 93b8b093..09e17ef8 100644
--- a/app/src/main/java/org/solovyev/android/sherlock/FragmentItem.java
+++ b/app/src/main/java/org/solovyev/android/sherlock/FragmentItem.java
@@ -33,7 +33,7 @@ import javax.annotation.Nonnull;
  */
 public interface FragmentItem {
 
-    public void onSelected(@Nonnull FragmentTransaction ft);
+    void onSelected(@Nonnull FragmentTransaction ft);
 
-    public void onUnselected(@Nonnull FragmentTransaction ft);
+    void onUnselected(@Nonnull FragmentTransaction ft);
 }
diff --git a/app/src/main/java/org/solovyev/android/wizard/Wizards.java b/app/src/main/java/org/solovyev/android/wizard/Wizards.java
index ff50b5ed..5c4e9615 100644
--- a/app/src/main/java/org/solovyev/android/wizard/Wizards.java
+++ b/app/src/main/java/org/solovyev/android/wizard/Wizards.java
@@ -12,8 +12,8 @@ public interface Wizards {
     Class<? extends Activity> getActivityClassName();
 
     @Nonnull
-    public Wizard getWizard(@Nullable String name, @Nullable Bundle arguments) throws IllegalArgumentException;
+    Wizard getWizard(@Nullable String name, @Nullable Bundle arguments) throws IllegalArgumentException;
 
     @Nonnull
-    public Wizard getWizard(@Nullable String name) throws IllegalArgumentException;
+    Wizard getWizard(@Nullable String name) throws IllegalArgumentException;
 }
diff --git a/jscl/src/main/java/jscl/AbstractJsclArithmeticException.java b/jscl/src/main/java/jscl/AbstractJsclArithmeticException.java
index 429e853c..b810065a 100644
--- a/jscl/src/main/java/jscl/AbstractJsclArithmeticException.java
+++ b/jscl/src/main/java/jscl/AbstractJsclArithmeticException.java
@@ -55,9 +55,8 @@ public abstract class AbstractJsclArithmeticException extends ArithmeticExceptio
 
         AbstractJsclArithmeticException that = (AbstractJsclArithmeticException) o;
 
-        if (!message.equals(that.message)) return false;
+        return message.equals(that.message);
 
-        return true;
     }
 
     @Override
diff --git a/jscl/src/main/java/jscl/math/function/ExtendedConstant.java b/jscl/src/main/java/jscl/math/function/ExtendedConstant.java
index 433ef06d..636ec5eb 100644
--- a/jscl/src/main/java/jscl/math/function/ExtendedConstant.java
+++ b/jscl/src/main/java/jscl/math/function/ExtendedConstant.java
@@ -108,9 +108,8 @@ public class ExtendedConstant implements Comparable<ExtendedConstant>, IConstant
 
         ExtendedConstant that = (ExtendedConstant) o;
 
-        if (!constant.equals(that.constant)) return false;
+        return constant.equals(that.constant);
 
-        return true;
     }
 
     @Override
diff --git a/jscl/src/main/java/jscl/math/function/Pow.java b/jscl/src/main/java/jscl/math/function/Pow.java
index 197f097d..0ee44db6 100644
--- a/jscl/src/main/java/jscl/math/function/Pow.java
+++ b/jscl/src/main/java/jscl/math/function/Pow.java
@@ -196,7 +196,7 @@ public class Pow extends Algebraic {
     }
 
     public Generic selfNumeric() {
-        return ((NumericWrapper) parameters[0]).pow((NumericWrapper) parameters[1]);
+        return ((NumericWrapper) parameters[0]).pow(parameters[1]);
     }
 
     public String toString() {
diff --git a/jscl/src/main/java/jscl/math/polynomial/TreePolynomial.java b/jscl/src/main/java/jscl/math/polynomial/TreePolynomial.java
index 447daa7e..6bc2ee47 100644
--- a/jscl/src/main/java/jscl/math/polynomial/TreePolynomial.java
+++ b/jscl/src/main/java/jscl/math/polynomial/TreePolynomial.java
@@ -144,7 +144,7 @@ final class TreePolynomial extends Polynomial {
             Iterator it = content.entrySet().iterator();
             while (it.hasNext()) {
                 Map.Entry e = (Map.Entry) it.next();
-                p.content.put(((Monomial) e.getKey()).multiply(monomial), (Generic) e.getValue());
+                p.content.put(((Monomial) e.getKey()).multiply(monomial), e.getValue());
             }
             p.degree = degree + monomial.degree();
             p.sugar = sugar + monomial.degree();
@@ -171,7 +171,7 @@ final class TreePolynomial extends Polynomial {
         Iterator it = content.entrySet().iterator();
         while (it.hasNext()) {
             Map.Entry e = (Map.Entry) it.next();
-            p.content.put(((Monomial) e.getKey()).divide(monomial), (Generic) e.getValue());
+            p.content.put(((Monomial) e.getKey()).divide(monomial), e.getValue());
         }
         p.degree = degree + monomial.degree();
         p.sugar = sugar + monomial.degree();
diff --git a/jscl/src/main/java/jscl/text/ParserUtils.java b/jscl/src/main/java/jscl/text/ParserUtils.java
index 9e5534bc..a5f39710 100644
--- a/jscl/src/main/java/jscl/text/ParserUtils.java
+++ b/jscl/src/main/java/jscl/text/ParserUtils.java
@@ -130,7 +130,7 @@ public class ParserUtils {
     }
 
     public static <T, U> T[] copyOf(U[] array, int newLength, Class<? extends T[]> newType) {
-        T[] copy = ((Object) newType == (Object) Object[].class)
+        T[] copy = (newType == Object[].class)
                 ? (T[]) new Object[newLength]
                 : (T[]) Array.newInstance(newType.getComponentType(), newLength);
 
diff --git a/jscl/src/main/java/jscl/util/AbstractExpressionGenerator.java b/jscl/src/main/java/jscl/util/AbstractExpressionGenerator.java
index 06fd565a..6b01f6fb 100644
--- a/jscl/src/main/java/jscl/util/AbstractExpressionGenerator.java
+++ b/jscl/src/main/java/jscl/util/AbstractExpressionGenerator.java
@@ -48,7 +48,7 @@ public abstract class AbstractExpressionGenerator<T> {
         return Math.random() * MAX_VALUE;
     }
 
-    protected static enum Operation {
+    protected enum Operation {
         addition(0, "+"),
         subtraction(1, "-"),
         multiplication(2, "*"),
@@ -79,7 +79,7 @@ public abstract class AbstractExpressionGenerator<T> {
         }
     }
 
-    protected static enum Function {
+    protected enum Function {
         sin(0, "sin"),
         cos(1, "cos"),
         sqrt(2, "√"),