primitive/class conversions are available since language level 1.5 (IDEA-111451)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting6/Java5CastConventions.java

@@ -0,0 +1,7 @@
+class Test {
+  public static void main(String[] args) {
+    Object o = null;
+    if (<error descr="Operator '==' cannot be applied to 'java.lang.Object', 'int'">o == 1</error>) {}
+    if (1 == o) {}
+  }
+}