java: complete classes with dollars in the middle (IDEA-247596)

requested for future panama boxes

GitOrigin-RevId: 188d54e94cc8c6dd4eb7818b3bceb004031b4984

java/java-impl/src/com/intellij/codeInsight/completion/scope/JavaCompletionProcessor.java

@@ -112,7 +112,7 @@ public final class JavaCompletionProcessor implements PsiScopeProcessor, Element
   @ApiStatus.Internal
   public static boolean seemsInternal(PsiClass clazz) {
     String name = clazz.getName();
-    return name != null && name.contains("$");
+    return name != null && name.startsWith("$");
   }
 
   @Override

java/java-tests/testData/codeInsight/completion/normal/ClassesWithDollarInTheMiddle.java

@@ -0,0 +1,5 @@
+import imported.*;
+
+class C {
+    WithD<caret>
+}

java/java-tests/testSrc/com/intellij/java/codeInsight/completion/NormalCompletionTest.groovy

@@ -1744,6 +1744,13 @@ class Foo extends myClass
     doAntiTest()
   }
 
+  void testClassesWithDollarInTheMiddle() {
+    myFixture.addClass('package imported; public class Foo$WithDollarImported {}')
+    configureByTestName()
+    myFixture.completeBasic()
+    assert 'Foo$WithDollarImported' in myFixture.lookupElementStrings
+  }
+
   @NeedsIndex.ForStandardLibrary
   void "test don't show static inner class after instance qualifier"() {
     myFixture.configureByText "a.java", """