@@ -10,7 +10,7 @@ import edu.stanford.nlp.process.SerializableFunction;
 import edu.stanford.nlp.stats.EquivalenceClasser;
 import edu.stanford.nlp.trees.*;
 import edu.stanford.nlp.trees.tregex.TregexMatcher;
-import edu.stanford.nlp.util.Filter;
+import java.util.function.Predicate;
 import edu.stanford.nlp.util.Index;
 
 import java.io.OutputStream;
@@ -667,7 +667,7 @@ public abstract class AbstractTreebankParserParams implements TreebankLangParser
 
   @Override
   public GrammaticalStructure getGrammaticalStructure(Tree t,
-                                                      Filter<String> filter,
+                                                      Predicate<String> filter,
                                                       HeadFinder hf) {
     throw new UnsupportedOperationException("This language does not support GrammaticalStructures or dependencies");
   }

@@ -29,7 +29,7 @@ package edu.stanford.nlp.parser.lexparser;
 import edu.stanford.nlp.io.RuntimeIOException;
 import edu.stanford.nlp.ling.*;
 import edu.stanford.nlp.trees.*;
-import edu.stanford.nlp.util.Filter;
+import java.util.function.Predicate;
 import edu.stanford.nlp.util.Index;
 
 import java.io.IOException;
@@ -2344,7 +2344,7 @@ public class EnglishTreebankParserParams extends AbstractTreebankParserParams {
 
   @Override
   public GrammaticalStructure getGrammaticalStructure(Tree t,
-                                                      Filter<String> filter,
+                                                      Predicate<String> filter,
                                                       HeadFinder hf) {
     return new EnglishGrammaticalStructure(t, filter, hf);
   }

@@ -4,7 +4,7 @@ import edu.stanford.nlp.process.TokenizerFactory;
 import edu.stanford.nlp.parser.metrics.AbstractEval;
 import edu.stanford.nlp.trees.*;
 import edu.stanford.nlp.ling.*;
-import edu.stanford.nlp.util.Filter;
+import java.util.function.Predicate;
 import edu.stanford.nlp.util.Index;
 
 import java.io.OutputStream;
@@ -234,7 +234,7 @@ public interface TreebankLangParserParams extends TreebankFactory, Serializable
    * UnsupportedOperationException if the language doesn't support
    * dependencies or GrammaticalStructures.
    */
-  GrammaticalStructure getGrammaticalStructure(Tree t, Filter<String> filter,
+  GrammaticalStructure getGrammaticalStructure(Tree t, Predicate<String> filter,
                                                HeadFinder hf);
 
   boolean supportsBasicDependencies();

@@ -6,7 +6,7 @@ import edu.stanford.nlp.neural.rnn.RNNCoreAnnotations;
 import edu.stanford.nlp.trees.MemoryTreebank;
 import edu.stanford.nlp.trees.Tree;
 import edu.stanford.nlp.util.CollectionUtils;
-import edu.stanford.nlp.util.Filter;
+import java.util.function.Predicate;
 import edu.stanford.nlp.util.Generics;
 
 /**
@@ -48,7 +48,7 @@ public class SentimentUtils {
     return trees;
   }
 
-  static final Filter<Tree> UNKNOWN_ROOT_FILTER = tree -> {
+  static final Predicate<Tree> UNKNOWN_ROOT_FILTER = tree -> {
     int gold = RNNCoreAnnotations.getGoldClass(tree);
     return gold != -1;
   };

@@ -10,7 +10,7 @@ import edu.stanford.nlp.trees.LabeledScoredTreeFactory;
 import edu.stanford.nlp.trees.Tree;
 import edu.stanford.nlp.trees.TreeFactory;
 import edu.stanford.nlp.trees.international.arabic.ArabicTreeNormalizer.ArabicEmptyFilter;
-import edu.stanford.nlp.util.Filter;
+import java.util.function.Predicate;
 import edu.stanford.nlp.util.Generics;
 
 /**
@@ -21,7 +21,7 @@ import edu.stanford.nlp.util.Generics;
  */
 public class ATBTreeUtils {
 
-  private static final Filter<Tree> emptyFilter = new ArabicEmptyFilter();
+  private static final Predicate<Tree> emptyFilter = new ArabicEmptyFilter();
   private static final TreeFactory tf = new LabeledScoredTreeFactory();
 
   //The default segmentation marker. Can be changed for processing e.g. IBM Arabic.