don't fold one-line methods with multi-line parameter list

java/java-psi-impl/src/com/intellij/codeInsight/folding/impl/JavaFoldingBuilderBase.java

@@ -598,9 +598,15 @@ public abstract class JavaFoldingBuilderBase extends CustomFoldingBuilder implem
 
     Document document = method.getContainingFile().getViewProvider().getDocument();
     PsiCodeBlock body = method.getBody();
-    if (body == null || document == null) {
+    PsiIdentifier nameIdentifier = method.getNameIdentifier();
+    if (body == null || document == null || nameIdentifier == null) {
       return false;
     }
+    if (document.getLineNumber(nameIdentifier.getTextRange().getStartOffset()) !=
+        document.getLineNumber(method.getParameterList().getTextRange().getEndOffset())) {
+      return false;
+    }
+
     PsiJavaToken lBrace = body.getLBrace();
     PsiJavaToken rBrace = body.getRBrace();
     PsiStatement[] statements = body.getStatements();

java/java-tests/testSrc/com/intellij/codeInsight/folding/JavaFoldingTest.groovy

@@ -568,14 +568,20 @@ class Test {
 
   public void "test fold one-line methods"() {
     configure """class Foo {
+ @Override
  int someMethod() {
    return 0;
  }
 
+ int someOtherMethod(
+   int param) {
+   return 0;
+ }
+
 }"""
     PsiClass fooClass = JavaPsiFacade.getInstance(project).findClass('Foo', GlobalSearchScope.allScope(project))
     def regions = myFixture.editor.foldingModel.allFoldRegions.sort { it.startOffset }
-    assert regions.size() == 2
+    assert regions.size() == 3
     checkAccessorFolding(regions[0], regions[1], fooClass.methods[0])
   }