IDEA-188425 Add getInstance option in completion popup

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

@@ -364,6 +364,14 @@ public class JavaMemberNameCompletionContributor extends CompletionContributor {
                 .withInsertHandler(ParenthesesInsertHandler.NO_PARAMETERS));
     }
 
+    if (element instanceof PsiField && ((PsiField)element).hasModifierProperty(PsiModifier.STATIC) &&
+        ourClassParent.equals(PsiUtil.resolveClassInClassTypeOnly(((PsiField)element).getType()))) {
+      set.add(LookupElementBuilder.create("getInstance")
+                                  .withIcon(PlatformIcons.METHOD_ICON)
+                                  .withTailText("()")
+                                  .withInsertHandler(ParenthesesInsertHandler.WITH_PARAMETERS));
+
+    }
     addLookupItems(set, null, matcher, element.getProject(), getUnresolvedReferences(ourClassParent, true));
 
     addLookupItems(set, null, matcher, element.getProject(), getPropertiesHandlersNames(

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

@@ -0,0 +1,3 @@
+public class Util {
+  static Util getI<caret>
+}

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

@@ -0,0 +1,3 @@
+public class Util {
+  static Util getInstance(<caret>)
+}

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

@@ -1850,4 +1850,6 @@ class Bar {{
     doTest('\n')
   }
 
+  void testSuggestGetInstanceMethodName() { doTest() }
+
 }