[java-completion] IDEA-381537 Unnecessary completion after constructor. Command Completion

GitOrigin-RevId: 121925c75aebd3656a6cb4086a01e1b52cc4cafd

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

@@ -82,7 +82,9 @@ public final class JavaMemberNameCompletionContributor extends CompletionContrib
       completeComponentName(lookupSet, component, result.getPrefixMatcher());
     }
 
-      if (PsiJavaPatterns.psiElement().nameIdentifierOf(PsiJavaPatterns.psiMethod().withParent(PsiClass.class)).accepts(position)) {
+    if (PsiJavaPatterns.psiElement().nameIdentifierOf(PsiJavaPatterns.psiMethod().withParent(PsiClass.class)).accepts(position) &&
+        !(PsiTreeUtil.prevVisibleLeaf(position) instanceof PsiJavaToken javaToken &&
+          javaToken.getTokenType() == JavaTokenType.DOT)) {
       completeMethodName(lookupSet, parameters.getPosition().getParent(), result.getPrefixMatcher());
     }
 

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

@@ -0,0 +1,9 @@
+package org.example;
+
+public class Person {
+  private String a;
+
+  public Person(String a).Pe<caret> {
+    this.a = a;
+  }
+}

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

@@ -0,0 +1,9 @@
+package org.example;
+
+public class Person {
+  private String a;
+
+  public Person(String a).Pe<caret> {
+    this.a = a;
+  }
+}

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

@@ -3258,4 +3258,10 @@ public class NormalCompletionTest extends NormalCompletionTestCase {
     myFixture.completeBasic();
     myFixture.checkResultByFile(getTestName(false) + "_after.java");
   }
+
+  public void testDotInsideConstructor() {
+    configureByTestName();
+    myFixture.completeBasic();
+    myFixture.checkResultByFile(getTestName(false) + "_after.java");
+  }
 }