autopopup after dot

java/java-impl/src/com/intellij/codeInsight/completion/JavaCompletionUtil.java

@@ -985,6 +985,10 @@ public class JavaCompletionUtil {
         }
       }
       toInsert.processTail(editor, context.getTailOffset());
+
+      if (context.getCompletionChar() == '.') {
+        AutoPopupController.getInstance(file.getProject()).autoPopupMemberLookup(context.getEditor(), null);
+      }
     }
   }
 

java/java-impl/src/com/intellij/codeInsight/lookup/VariableLookupItem.java

@@ -1,5 +1,6 @@
 package com.intellij.codeInsight.lookup;
 
+import com.intellij.codeInsight.AutoPopupController;
 import com.intellij.codeInsight.TailType;
 import com.intellij.codeInsight.completion.InsertionContext;
 import com.intellij.psi.PsiSubstitutor;
@@ -41,5 +42,9 @@ public class VariableLookupItem extends LookupItem<PsiVariable> implements Typed
       context.setAddCompletionChar(false);
       TailType.COMMA.processTail(context.getEditor(), context.getTailOffset());
     }
+    else if (context.getCompletionChar() == '.') {
+      AutoPopupController.getInstance(context.getProject()).autoPopupMemberLookup(context.getEditor(), null);
+    }
+
   }
 }

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

@@ -344,6 +344,26 @@ class JavaAutoPopupTest extends CompletionAutoPopupTestCase {
     assert 'Thread' in myFixture.lookupElementStrings
   }
 
+  public void testDotAfterVariable() {
+    myFixture.configureByText("a.java", """
+    class A {
+      { Object ooo; <caret> }
+    }
+    """)
+    type 'o.'
+    assert myFixture.file.text.contains("ooo.")
+    assert lookup
+  }
 
+  public void testDotAfterCall() {
+    myFixture.configureByText("a.java", """
+    class A {
+      { <caret> }
+    }
+    """)
+    type 'tos.'
+    assert myFixture.file.text.contains("toString().")
+    assert lookup
+  }
 
 }