add testcase for issue #3355

core/src/test/java/com/alibaba/fastjson2/issues_3300/Issue3355.java

@@ -0,0 +1,22 @@
+package com.alibaba.fastjson2.issues_3300;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class Issue3355 {
+    @Test
+    public void test() {
+        com.alibaba.fastjson.JSONObject jsonObject1 = new com.alibaba.fastjson.JSONObject();
+        Bean bean1 = jsonObject1.toJavaObject(Bean.class);
+
+        com.alibaba.fastjson2.JSONObject jsonObject = new com.alibaba.fastjson2.JSONObject();
+        Bean bean2 = jsonObject.toJavaObject(Bean.class);
+
+        assertEquals(bean2.value, bean1.value);
+    }
+
+    public static class Bean {
+        public Integer value = 2;
+    }
+}