refactor: Static imports for Collections and Collectors (#804)

Use this link to re-run the recipe: https://app.moderne.io/builder/m9HsHwu2Z?organizationId=ODQ2MGExMTUtNDg0My00N2EwLTgzMGMtNGE1NGExMTBmZDkw

Co-authored-by: Moderne <[email protected]>

Author: timtebeek

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaAtomicsNewReference.java

@@ -25,9 +25,10 @@
 import org.openrewrite.java.search.UsesMethod;
 import org.openrewrite.java.tree.J;
 
-import java.util.Collections;
 import java.util.Set;
 
+import static java.util.Collections.singleton;
+
 public class NoGuavaAtomicsNewReference extends Recipe {
     private static final MethodMatcher NEW_ATOMIC_REFERENCE = new MethodMatcher("com.google.common.util.concurrent.Atomics newReference(..)");
 
@@ -43,7 +44,7 @@ public String getDescription() {
 
     @Override
     public Set<String> getTags() {
-        return Collections.singleton("guava");
+        return singleton("guava");
     }
 
     @Override

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaDirectExecutor.java

@@ -25,9 +25,10 @@
 import org.openrewrite.java.search.UsesMethod;
 import org.openrewrite.java.tree.J;
 
-import java.util.Collections;
 import java.util.Set;
 
+import static java.util.Collections.singleton;
+
 public class NoGuavaDirectExecutor extends Recipe {
     private static final MethodMatcher DIRECT_EXECUTOR = new MethodMatcher("com.google.common.util.concurrent.MoreExecutors directExecutor()");
 
@@ -43,7 +44,7 @@ public String getDescription() {
 
     @Override
     public Set<String> getTags() {
-        return Collections.singleton("guava");
+        return singleton("guava");
     }
 
     @Override

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaListsNewArrayList.java

@@ -26,9 +26,10 @@
 import org.openrewrite.java.tree.J;
 import org.openrewrite.java.tree.TypeUtils;
 
-import java.util.Collections;
 import java.util.Set;
 
+import static java.util.Collections.singleton;
+
 public class NoGuavaListsNewArrayList extends Recipe {
     private static final MethodMatcher NEW_ARRAY_LIST = new MethodMatcher("com.google.common.collect.Lists newArrayList()");
     private static final MethodMatcher NEW_ARRAY_LIST_ITERABLE = new MethodMatcher("com.google.common.collect.Lists newArrayList(java.lang.Iterable)");
@@ -46,7 +47,7 @@ public String getDescription() {
 
     @Override
     public Set<String> getTags() {
-        return Collections.singleton("guava");
+        return singleton("guava");
     }
 
     @Override

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaListsNewCopyOnWriteArrayList.java

@@ -26,9 +26,10 @@
 import org.openrewrite.java.tree.J;
 import org.openrewrite.java.tree.TypeUtils;
 
-import java.util.Collections;
 import java.util.Set;
 
+import static java.util.Collections.singleton;
+
 public class NoGuavaListsNewCopyOnWriteArrayList extends Recipe {
     private static final MethodMatcher NEW_ARRAY_LIST = new MethodMatcher("com.google.common.collect.Lists newCopyOnWriteArrayList()");
     private static final MethodMatcher NEW_ARRAY_LIST_ITERABLE = new MethodMatcher("com.google.common.collect.Lists newCopyOnWriteArrayList(java.lang.Iterable)");
@@ -45,7 +46,7 @@ public String getDescription() {
 
     @Override
     public Set<String> getTags() {
-        return Collections.singleton("guava");
+        return singleton("guava");
     }
 
     @Override

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaListsNewLinkedList.java

@@ -26,9 +26,10 @@
 import org.openrewrite.java.tree.J;
 import org.openrewrite.java.tree.TypeUtils;
 
-import java.util.Collections;
 import java.util.Set;
 
+import static java.util.Collections.singleton;
+
 public class NoGuavaListsNewLinkedList extends Recipe {
     private static final MethodMatcher NEW_LINKED_LIST = new MethodMatcher("com.google.common.collect.Lists newLinkedList()");
     private static final MethodMatcher NEW_LINKED_LIST_ITERABLE = new MethodMatcher("com.google.common.collect.Lists newLinkedList(java.lang.Iterable)");
@@ -45,7 +46,7 @@ public String getDescription() {
 
     @Override
     public Set<String> getTags() {
-        return Collections.singleton("guava");
+        return singleton("guava");
     }
 
     @Override

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaMapsNewHashMap.java

@@ -25,9 +25,10 @@
 import org.openrewrite.java.search.UsesMethod;
 import org.openrewrite.java.tree.J;
 
-import java.util.Collections;
 import java.util.Set;
 
+import static java.util.Collections.singleton;
+
 public class NoGuavaMapsNewHashMap extends Recipe {
     private static final MethodMatcher NEW_HASH_MAP = new MethodMatcher("com.google.common.collect.Maps newHashMap()");
     private static final MethodMatcher NEW_HASH_MAP_WITH_MAP = new MethodMatcher("com.google.common.collect.Maps newHashMap(java.util.Map)");
@@ -44,7 +45,7 @@ public String getDescription() {
 
     @Override
     public Set<String> getTags() {
-        return Collections.singleton("guava");
+        return singleton("guava");
     }
 
     @Override

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaMapsNewLinkedHashMap.java

@@ -25,9 +25,10 @@
 import org.openrewrite.java.search.UsesMethod;
 import org.openrewrite.java.tree.J;
 
-import java.util.Collections;
 import java.util.Set;
 
+import static java.util.Collections.singleton;
+
 public class NoGuavaMapsNewLinkedHashMap extends Recipe {
     private static final MethodMatcher NEW_LINKED_HASH_MAP = new MethodMatcher("com.google.common.collect.Maps newLinkedHashMap()");
     private static final MethodMatcher NEW_LINKED_HASH_MAP_WITH_MAP = new MethodMatcher("com.google.common.collect.Maps newLinkedHashMap(java.util.Map)");
@@ -44,7 +45,7 @@ public String getDescription() {
 
     @Override
     public Set<String> getTags() {
-        return Collections.singleton("guava");
+        return singleton("guava");
     }
 
     @Override

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaMapsNewTreeMap.java

@@ -25,9 +25,10 @@
 import org.openrewrite.java.search.UsesMethod;
 import org.openrewrite.java.tree.J;
 
-import java.util.Collections;
 import java.util.Set;
 
+import static java.util.Collections.singleton;
+
 public class NoGuavaMapsNewTreeMap extends Recipe {
     private static final MethodMatcher NEW_TREE_MAP = new MethodMatcher("com.google.common.collect.Maps newTreeMap()");
     private static final MethodMatcher NEW_TREE_MAP_WITH_COMPARATOR = new MethodMatcher("com.google.common.collect.Maps newTreeMap(java.util.Comparator)");
@@ -45,7 +46,7 @@ public String getDescription() {
 
     @Override
     public Set<String> getTags() {
-        return Collections.singleton("guava");
+        return singleton("guava");
     }
 
     @Override

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaPrimitiveAsList.java

@@ -25,7 +25,7 @@
 import org.openrewrite.java.search.UsesMethod;
 import org.openrewrite.java.tree.J;
 
-import java.util.Collections;
+import static java.util.Collections.nCopies;
 
 public class NoGuavaPrimitiveAsList extends Recipe {
 
@@ -59,7 +59,7 @@ public J.MethodInvocation visitMethodInvocation(J.MethodInvocation elem, Executi
                             maybeRemoveImport("com.google.common.primitives.Bytes");
                             maybeAddImport("java.util.Arrays");
 
-                            String args = String.join(",", Collections.nCopies(elem.getArguments().size(), "#{any()}"));
+                            String args = String.join(",", nCopies(elem.getArguments().size(), "#{any()}"));
                             return JavaTemplate
                                     .builder("Arrays.asList(" + args + ')')
                                     .imports("java.util.Arrays")

src/main/java/org/openrewrite/java/migrate/guava/NoGuavaSetsNewConcurrentHashSet.java

@@ -25,9 +25,10 @@
 import org.openrewrite.java.search.UsesMethod;
 import org.openrewrite.java.tree.J;
 
-import java.util.Collections;
 import java.util.Set;
 
+import static java.util.Collections.singleton;
+
 public class NoGuavaSetsNewConcurrentHashSet extends Recipe {
     private static final MethodMatcher NEW_HASH_SET = new MethodMatcher("com.google.common.collect.Sets newConcurrentHashSet()");
 
@@ -43,7 +44,7 @@ public String getDescription() {
 
     @Override
     public Set<String> getTags() {
-        return Collections.singleton("guava");
+        return singleton("guava");
     }
 
     @Override