[java-inspections] IDEA-360291 'Make method constructor' fix shouldn't be shown for implicit classes

GitOrigin-RevId: ba571565430db01d06d37f2da5ab49a97b466db4

java/java-impl/src/com/siyeh/ig/naming/MethodNameSameAsClassNameInspection.java

@@ -104,6 +104,7 @@ public final class MethodNameSameAsClassNameInspection extends BaseInspection {
       final String methodName = method.getName();
       final PsiClass containingClass = method.getContainingClass();
       if (containingClass == null) return;
+      if (containingClass instanceof PsiImplicitClass) return;
       final String className = containingClass.getName();
       if (!methodName.equals(className)) return;
 

java/java-tests/testData/ig/com/siyeh/igfixes/naming/method_name_same_as_class_name/main.java

@@ -0,0 +1,3 @@
+public static void main<caret>(String[] args) {
+    System.out.println("Hello, World!");
+}

java/java-tests/testSrc/com/siyeh/ig/naming/MethodNameSameAsClassNameInspectionTest.java

@@ -1,6 +1,8 @@
-// Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.siyeh.ig.naming;
 
+import com.intellij.pom.java.JavaFeature;
+import com.intellij.testFramework.IdeaTestUtil;
 import com.siyeh.ig.BaseInspection;
 import com.siyeh.ig.IGQuickFixesTestCase;
 
@@ -23,6 +25,11 @@ public class MethodNameSameAsClassNameInspectionTest extends IGQuickFixesTestCas
   public void testConflictingCtor() { assertQuickfixNotAvailable(); }
   public void testConflictingCtorErasure() { assertQuickfixNotAvailable(); }
 
+  @SuppressWarnings("SpellCheckingInspection")
+  public void testmain() {
+    IdeaTestUtil.withLevel(getModule(), JavaFeature.IMPLICIT_CLASSES.getMinimumLevel(), () -> assertQuickfixNotAvailable());
+  }
+
   @Override
   protected String getRelativePath() {
     return "naming/method_name_same_as_class_name";