do not add unnamed class to structure view

GitOrigin-RevId: 5a52ddb07b351ff4daab960f789eb481eb927c2f

java/java-structure-view/src/com/intellij/ide/structureView/impl/java/JavaFileTreeElement.java

@@ -20,6 +20,8 @@ import com.intellij.ide.structureView.impl.common.PsiTreeElementBase;
 import com.intellij.navigation.ItemPresentation;
 import com.intellij.psi.PsiClass;
 import com.intellij.psi.PsiClassOwner;
+import com.intellij.psi.PsiUnnamedClass;
+import com.intellij.psi.util.JavaUnnamedClassUtil;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -43,6 +45,12 @@ public class JavaFileTreeElement extends PsiTreeElementBase<PsiClassOwner> imple
     PsiClassOwner element = getElement();
     if (element == null) return Collections.emptyList();
     PsiClass[] classes = element.getClasses();
+
+    PsiUnnamedClass unnamedClass = JavaUnnamedClassUtil.getUnnamedClassFor(element);
+    if (unnamedClass != null) {
+      return JavaClassTreeElement.getClassChildren(unnamedClass);
+    }
+
     ArrayList<StructureViewTreeElement> result = new ArrayList<>();
     for (PsiClass aClass : classes) {
       result.add(new JavaClassTreeElement(aClass, false));

java/java-tests/testSrc/com/intellij/java/structureView/JavaStructureViewTest.java

@@ -363,8 +363,7 @@ public class JavaStructureViewTest extends LightJavaStructureViewTestCaseBase {
 
       """
         -Test.java
-         -PsiUnnamedClass
-          foo(): void"""
+         foo(): void"""
     );
   }