diff --git a/samples/java/sbt/project/plugins.sbt b/samples/java/sbt/project/plugins.sbt
index c2371be434..737941ded0 100644
--- a/samples/java/sbt/project/plugins.sbt
+++ b/samples/java/sbt/project/plugins.sbt
@@ -1 +1 @@
-addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.1.0")
+addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "4.0.0")
diff --git a/samples/java/sbt/src/main/java/DetectFaceDemo.java b/samples/java/sbt/src/main/java/DetectFaceDemo.java
index af842d38c6..2b795351db 100644
--- a/samples/java/sbt/src/main/java/DetectFaceDemo.java
+++ b/samples/java/sbt/src/main/java/DetectFaceDemo.java
@@ -5,6 +5,7 @@ import org.opencv.core.Point;
 import org.opencv.core.Rect;
 import org.opencv.core.Scalar;
 import org.opencv.imgcodecs.Imgcodecs;
+import org.opencv.imgproc.Imgproc;
 import org.opencv.objdetect.CascadeClassifier;
 
 /*
diff --git a/samples/java/sbt/src/main/scala/ScalaCorrespondenceMatchingDemo.scala b/samples/java/sbt/src/main/scala/ScalaCorrespondenceMatchingDemo.scala
index e8259827a3..47eae31570 100644
--- a/samples/java/sbt/src/main/scala/ScalaCorrespondenceMatchingDemo.scala
+++ b/samples/java/sbt/src/main/scala/ScalaCorrespondenceMatchingDemo.scala
@@ -21,8 +21,8 @@ object ScalaCorrespondenceMatchingDemo {
     def detectAndExtract(mat: Mat) = {
       // A special container class for KeyPoint.
       val keyPoints = new MatOfKeyPoint
-      // We're using the SURF detector.
-      val detector = FeatureDetector.create(FeatureDetector.SURF)
+      // We're using the ORB detector.
+      val detector = FeatureDetector.create(FeatureDetector.ORB)
       detector.detect(mat, keyPoints)
 
       println(s"There were ${keyPoints.toArray.size} KeyPoints detected")
@@ -34,8 +34,8 @@ object ScalaCorrespondenceMatchingDemo {
       // arguments.
       val bestKeyPoints: MatOfKeyPoint = new MatOfKeyPoint(sorted: _*)
 
-      // We're using the SURF descriptor.
-      val extractor = DescriptorExtractor.create(DescriptorExtractor.SURF)
+      // We're using the ORB descriptor.
+      val extractor = DescriptorExtractor.create(DescriptorExtractor.ORB)
       val descriptors = new Mat
       extractor.compute(mat, bestKeyPoints, descriptors)
 
diff --git a/samples/java/sbt/src/main/scala/ScalaDetectFaceDemo.scala b/samples/java/sbt/src/main/scala/ScalaDetectFaceDemo.scala
index d1df0e3760..cf8a1a2ee8 100644
--- a/samples/java/sbt/src/main/scala/ScalaDetectFaceDemo.scala
+++ b/samples/java/sbt/src/main/scala/ScalaDetectFaceDemo.scala
@@ -3,6 +3,7 @@ import org.opencv.core.MatOfRect
 import org.opencv.core.Point
 import org.opencv.core.Scalar
 import org.opencv.imgcodecs.Imgcodecs
+import org.opencv.imgproc.Imgproc
 import org.opencv.objdetect.CascadeClassifier
 import reflect._