diff --git a/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java b/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java
index ed9b20523cd..d644540503e 100644
--- a/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java
+++ b/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java
@@ -298,7 +298,7 @@ public static Matcher<? super MethodInvocationTree> receiverSameAsArgument(int a
         return ASTHelpers.sameVariable(fieldAccess.getExpression(), arg);
       } else if (methodSelect instanceof JCIdent) {
         // A bare method call: "equals(foo)".  Receiver is implicitly "this".
-        return "this".equals(arg.toString());
+        return arg.toString().equals("this");
       }
 
       return false;
@@ -990,7 +990,7 @@ public static Matcher<VariableTree> variableInitializer(
    * constant, parameter to a method, etc.
    */
   public static Matcher<VariableTree> isField() {
-    return (variableTree, state) -> ElementKind.FIELD == getSymbol(variableTree).getKind();
+    return (variableTree, state) -> getSymbol(variableTree).getKind() == ElementKind.FIELD;
   }
 
   /** Matches if a {@link ClassTree} is an enum declaration. */
diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/LambdaFunctionalInterface.java b/core/src/main/java/com/google/errorprone/bugpatterns/LambdaFunctionalInterface.java
index c3528cbae7a..af7fca37beb 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/LambdaFunctionalInterface.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/LambdaFunctionalInterface.java
@@ -217,7 +217,7 @@ private boolean methodCallsMeetConditions(Symbol sym, VisitorState state) {
 
     for (MethodInvocationTree methodInvocationTree : methodCallMap.values()) {
       if (methodInvocationTree.getArguments().stream()
-          .filter(a -> Kind.LAMBDA_EXPRESSION.equals(a.getKind()))
+          .filter(a -> a.getKind().equals(Kind.LAMBDA_EXPRESSION))
           .filter(a -> hasFunctionAsArg(a, state))
           .noneMatch(
               a ->
diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/MutablePublicArray.java b/core/src/main/java/com/google/errorprone/bugpatterns/MutablePublicArray.java
index 164fb6cefe3..79d719f76a1 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/MutablePublicArray.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/MutablePublicArray.java
@@ -73,7 +73,7 @@ private static boolean nonEmptyArrayMatcher(VariableTree arrayExpression, Visito
     JCNewArray newArray = (JCNewArray) initializer;
     if (!newArray.getDimensions().isEmpty()) {
       return !newArray.getDimensions().stream()
-          .allMatch(e -> Objects.equals(0, ASTHelpers.constValue(e, Integer.class)));
+          .allMatch(e -> Objects.equals(ASTHelpers.constValue(e, Integer.class), 0));
     }
     // For in line array initializer.
     return newArray.getInitializers() != null && !newArray.getInitializers().isEmpty();
diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/OutlineNone.java b/core/src/main/java/com/google/errorprone/bugpatterns/OutlineNone.java
index 06e0465ed45..abd1e2f8eb6 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/OutlineNone.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/OutlineNone.java
@@ -33,6 +33,7 @@
 import com.sun.source.tree.ExpressionTree;
 import com.sun.source.tree.MethodInvocationTree;
 import java.util.List;
+import java.util.Objects;
 import java.util.regex.Pattern;
 
 /** Check for the a11y antipattern of setting CSS outline attributes to none or 0. */
@@ -92,7 +93,7 @@ public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState
      */
     if (GWT_SET_PROPERTY.matches(tree, state)
         && args.size() >= 2
-        && "outline".equals(constValue(args.get(0), String.class))
+        && Objects.equals(constValue(args.get(0), String.class), "outline")
         && constantNoneOrZero(args.get(1))) {
       return describeMatch(tree);
     }
diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/StatementSwitchToExpressionSwitch.java b/core/src/main/java/com/google/errorprone/bugpatterns/StatementSwitchToExpressionSwitch.java
index fd490cbc95e..9099a20f0d7 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/StatementSwitchToExpressionSwitch.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/StatementSwitchToExpressionSwitch.java
@@ -152,11 +152,11 @@ private static AnalysisResult analyzeSwitchTree(SwitchTree switchTree) {
         } else {
           allCasesHaveDefiniteControlFlow &=
               !fallsIntoDefaultCase
-                  && CaseFallThru.DEFINITELY_DOES_NOT_FALL_THRU.equals(caseFallThru);
+                  && caseFallThru.equals(CaseFallThru.DEFINITELY_DOES_NOT_FALL_THRU);
         }
       } else {
         // Cases other than default
-        allCasesHaveDefiniteControlFlow &= !CaseFallThru.MAYBE_FALLS_THRU.equals(caseFallThru);
+        allCasesHaveDefiniteControlFlow &= !caseFallThru.equals(CaseFallThru.MAYBE_FALLS_THRU);
       }
     }
 
@@ -248,7 +248,7 @@ private Description convertDirectlyToExpressionSwitch(
         // If block is just space or a single "break;" with no explanatory comments, then remove
         // it to eliminate redundancy and improve readability
         if (trimmedTransformedBlockSource.isEmpty()
-            || "break;".equals(trimmedTransformedBlockSource)) {
+            || trimmedTransformedBlockSource.equals("break;")) {
           replacementCodeBuilder.append("{}");
         } else {
           replacementCodeBuilder.append("{").append(transformedBlockSource).append("\n}");
@@ -319,7 +319,7 @@ private static Optional<String> extractCommentsBeforeRemovedBreak(
   private static ImmutableList<StatementTree> filterOutRedundantBreak(CaseTree caseTree) {
     boolean caseEndsWithUnlabelledBreak =
         Streams.findLast(caseTree.getStatements().stream())
-            .filter(statement -> BREAK.equals(statement.getKind()))
+            .filter(statement -> statement.getKind().equals(BREAK))
             .filter(breakTree -> ((BreakTree) breakTree).getLabel() == null)
             .isPresent();
     return caseEndsWithUnlabelledBreak
diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/inlineme/Inliner.java b/core/src/main/java/com/google/errorprone/bugpatterns/inlineme/Inliner.java
index 002d9a0b752..ddca748d1e4 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/inlineme/Inliner.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/inlineme/Inliner.java
@@ -130,11 +130,11 @@ public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState
     ExpressionTree methodSelectTree = tree.getMethodSelect();
     if (methodSelectTree != null) {
       String methodSelect = state.getSourceForNode(methodSelectTree);
-      if ("super".equals(methodSelect)) {
+      if (methodSelect.equals("super")) {
         receiverString = methodSelect;
       }
       // TODO(kak): Can we omit the `this` case? The getReceiver() call above handles `this`
-      if ("this".equals(methodSelect)) {
+      if (methodSelect.equals("this")) {
         receiverString = methodSelect;
       }
     }