diff --git a/java/java-impl/src/com/intellij/refactoring/extractclass/ExtractedClassBuilder.java b/java/java-impl/src/com/intellij/refactoring/extractclass/ExtractedClassBuilder.java
index f83596f86575..ba0152ed2361 100644
--- a/java/java-impl/src/com/intellij/refactoring/extractclass/ExtractedClassBuilder.java
+++ b/java/java-impl/src/com/intellij/refactoring/extractclass/ExtractedClassBuilder.java
@@ -182,7 +182,7 @@ class ExtractedClassBuilder {
     }
     int counter = 1;
     while (true) {
-      name = name + counter;
+      name += counter;
       if (!existsFieldWithName(name)) {
         backPointerName = name;
         return;
diff --git a/platform/platform-impl/src/com/intellij/openapi/vfs/impl/FilePartNodeRoot.java b/platform/platform-impl/src/com/intellij/openapi/vfs/impl/FilePartNodeRoot.java
index c33cc031dd6c..ed3fa237b3d2 100644
--- a/platform/platform-impl/src/com/intellij/openapi/vfs/impl/FilePartNodeRoot.java
+++ b/platform/platform-impl/src/com/intellij/openapi/vfs/impl/FilePartNodeRoot.java
@@ -214,7 +214,7 @@ final class FilePartNodeRoot extends FilePartNode {
         StringUtil.endsWith(path, 0, end, JarFileSystem.JAR_SEPARATOR) && end > 2 && path.charAt(end - 3) != '/';
       if (isJarSeparator) {
         names.add(JarFileSystem.JAR_SEPARATOR);
-        end = end - 2;
+        end -= 2;
         continue;
       }
       if (path.charAt(end-1) == '/') {