[Parameter Name Hints] show hints for single param methods if method returns something and has boolean parameter

java/java-impl/src/com/intellij/codeInsight/daemon/impl/ParameterNameHintsManager.java

@@ -72,13 +72,19 @@ public class ParameterNameHintsManager {
       PsiMethod method = (PsiMethod)element;
       if (isSetter(method)) return false;
       if (hasSingleParameter(method)) {
-        return PsiType.VOID.equals(method.getReturnType());
+        PsiParameter parameter = method.getParameterList().getParameters()[0];
+        return PsiType.VOID.equals(method.getReturnType()) || isBoolean(parameter);
       }
       return !isCommonMethod(method);
     }
     return false;
   }
 
+  private static boolean isBoolean(PsiParameter parameter) {
+    PsiType type = parameter.getType();
+    return PsiType.BOOLEAN.equals(type) || PsiType.BOOLEAN.equals(PsiPrimitiveType.getUnboxedType(type));
+  }
+
   private static boolean hasSingleParameter(PsiMethod method) {
     return method.getParameterList().getParametersCount() == 1;
   }

java/java-tests/testSrc/com/intellij/codeInsight/daemon/inlays/InlayParameterHintsTest.kt

@@ -589,6 +589,22 @@ class Test {
     onLineStartingWith("drawRect").assertInlays("w->10", "h->12")
   }
   
+  fun `test show for method with boolean param and return value`() {
+    setup("""
+class Test {
+  
+  void test() {
+    String name = getTestName(true);
+    System.out.println("");
+  }
+  
+  String getTestName(boolean lowerCase) {}
+}
+""")
+    
+    onLineStartingWith("String name").assertInlays("lowerCase->true")
+  }
+  
   private fun getInlays(): List<Inlay> {
     val editor = myFixture.editor
     return editor.inlayModel.getInlineElementsInRange(0, editor.document.textLength)