Index: applications/editors/josm/plugins/addrinterpolation/src/org/openstreetmap/josm/plugins/AddrInterpolation/AddrInterpolationDialog.java
===================================================================
--- applications/editors/josm/plugins/addrinterpolation/src/org/openstreetmap/josm/plugins/AddrInterpolation/AddrInterpolationDialog.java	(revision 34657)
+++ applications/editors/josm/plugins/addrinterpolation/src/org/openstreetmap/josm/plugins/AddrInterpolation/AddrInterpolationDialog.java	(revision 34658)
@@ -352,5 +352,5 @@
             char endingChar = endValueString.charAt(endValueString.length()-1);
 
-            if ((!IsNumeric("" + startingChar)) && (!IsNumeric("" + endingChar))) {
+            if (!IsNumeric("" + startingChar) && !IsNumeric("" + endingChar)) {
                 // Both end with alpha
                 SelectInterpolationMethod("alphabetic");
@@ -358,5 +358,5 @@
             }
 
-            if ((IsNumeric("" + startingChar)) && (!IsNumeric("" + endingChar))) {
+            if (IsNumeric("" + startingChar) && !IsNumeric("" + endingChar)) {
                 endingChar = Character.toUpperCase(endingChar);
                 if ((endingChar >= 'A') && (endingChar <= 'Z')) {
@@ -1080,5 +1080,5 @@
             }
             Map<String, String> tags = new HashMap<>();
-            if ((city != null) || (streetNameButton.isSelected())) {
+            if (city != null || streetNameButton.isSelected()) {
                 // Include street unconditionally if adding nodes only or city name specified
                 tags.put("addr:street", streetName);
@@ -1180,5 +1180,5 @@
 
             boolean isOk = false;
-            if ((IsNumeric("" + startingChar)) && (!IsNumeric("" + endingChar))) {
+            if (IsNumeric("" + startingChar) && !IsNumeric("" + endingChar)) {
                 endingChar = Character.toUpperCase(endingChar);
                 if ((endingChar >= 'A') && (endingChar <= 'Z')) {
@@ -1186,5 +1186,5 @@
                     isOk = true;
                 }
-            } else if ((!IsNumeric("" + startingChar)) && (!IsNumeric("" + endingChar))) {
+            } else if (!IsNumeric("" + startingChar) && !IsNumeric("" + endingChar)) {
                 // Both are alpha
                 isOk = true;