Java: allow importing a class when there is a variable/method with the exact same name (IDEA-216101)

GitOrigin-RevId: e4c5b86ce2f4910711e33581c58d271dadbf6970

java/java-impl/src/com/intellij/codeInsight/daemon/impl/quickfix/ImportClassFixBase.java

@@ -145,7 +145,7 @@ public abstract class ImportClassFixBase<T extends PsiElement, R extends PsiRefe
       PsiElement element = result.getElement();
       // already imported
       // can happen when e.g., class name happened to be in a method position
-      if (result.isValidResult() || element instanceof PsiClass && result.getCurrentFileResolveScope() instanceof PsiImportStatement) {
+      if (element instanceof PsiClass && (result.isValidResult() || result.getCurrentFileResolveScope() instanceof PsiImportStatement)) {
         return PsiClass.EMPTY_ARRAY;
       }
     }

java/java-impl/src/com/intellij/psi/impl/source/codeStyle/JavaReferenceAdjuster.java

@@ -299,7 +299,7 @@ public final class JavaReferenceAdjuster implements ReferenceAdjuster {
           }
         }
       }
-      return helper.resolveReferencedVariable(referenceText, psiReference) == null;
+      return !(psiReference instanceof PsiReferenceExpression) || helper.resolveReferencedVariable(referenceText, psiReference) == null;
     }
     return false;
   }

java/java-tests/testData/refactoring/inplaceIntroduceConstant/correctConstantPosition_after.java

@@ -1,6 +1,6 @@
 public class Res {
 
-    public static final Res.R<String, Object> R = new R<>() {
+    public static final R<String, Object> R = new R<>() {
         final String param = "";
 
         @Override

java/java-tests/testSrc/com/intellij/java/codeInsight/intention/AddImportActionTest.java

@@ -76,6 +76,26 @@ public class AddImportActionTest extends LightJavaCodeInsightFixtureTestCase {
                             """);
   }
 
+  public void testClassNameResolvesToVariableName() {
+    myFixture.configureByText(JavaFileType.INSTANCE, """
+      public class Base {
+      	private <caret>URL URL;
+      
+      	protected void test(URL url) {
+      	}
+      }""");
+    importClass();
+    myFixture.checkResult("""
+                            import java.net.URL;
+                            
+                            public class Base {
+                            	private URL URL;
+                            
+                            	protected void test(URL url) {
+                            	}
+                            }""");
+  }
+
   public void testMethodReference() {
     myFixture.configureByText(JavaFileType.INSTANCE, """
       public class Importing {