IDEA-85035 Wrong "possible NPE" warning

2026-09-18 09:34:34 +07:00 · 2012-04-23 15:58:21 +02:00
parent 9c2e2c691e
commit f0d7a0d5a6
3 changed files with 27 additions and 10 deletions
@@ -0,0 +1,26 @@
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collection;
+
+public class Bar3 {
+
+  @NotNull
+  Object getObj() {
+    return new Object();
+  }
+
+  void foo(Collection<Object> collection) {
+    if (!collection.isEmpty()) {
+      Object first = collection.iterator().next();
+      if (first != getObj() || collection.size() > 0) {
+        System.out.println(first.hashCode());
+      }
+      if (first == getObj() || collection.size() > 0) {
+        System.out.println(first.hashCode());
+      }
+      if (first == null) {
+        System.out.println(<warning descr="Method invocation 'first.hashCode()' may produce 'java.lang.NullPointerException'">first.hashCode()</warning>);
+      }
+    }
+  }
+}