redundant throws: do not warn on native methods IDEA-205525

java/java-analysis-impl/src/com/intellij/codeInspection/unneededThrows/RedundantThrowsDeclarationInspection.java

@@ -8,6 +8,7 @@ import com.intellij.codeInsight.daemon.impl.quickfix.MethodThrowsFix;
 import com.intellij.codeInspection.*;
 import com.intellij.codeInspection.reference.*;
 import com.intellij.codeInspection.ui.SingleCheckboxOptionsPanel;
+import com.intellij.lang.jvm.JvmModifier;
 import com.intellij.openapi.application.WriteAction;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.project.Project;
@@ -71,6 +72,9 @@ public class RedundantThrowsDeclarationInspection extends GlobalJavaBatchInspect
 
       PsiElement psiMethod = refMethod.getPsiElement();
       if (!(psiMethod instanceof PsiMethod)) return null;
+
+      if (((PsiMethod)psiMethod).hasModifier(JvmModifier.NATIVE)) return null;
+
       PsiReferenceList list = ((PsiMethod)psiMethod).getThrowsList();
       PsiClassType[] throwsList = list.getReferencedTypes();
       PsiJavaCodeReferenceElement[] throwsRefs = list.getReferenceElements();

java/java-tests/testData/inspection/redundantThrow/NativeMethod/expected.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems/>
+

java/java-tests/testData/inspection/redundantThrow/NativeMethod/src/Foo.java

@@ -0,0 +1,11 @@
+import java.io.*;
+
+class Bar {
+
+  public native int goDrink(String arg) throws IOException;
+
+  public static void main(String[] args) throws IOException {
+    Bar bar = new Bar();
+    bar.goDrink("aaa");
+  }
+}

java/java-tests/testSrc/com/intellij/java/codeInspection/RedundantThrowTest.java

@@ -58,4 +58,8 @@ public class RedundantThrowTest extends InspectionTestCase {
   public void testThrownClausesInMethodReference() {
     doTest();
   }
+
+  public void testNativeMethod() {
+    doTest();
+  }
 }