fix bug for issue #3719 (#3721)

core/src/main/java/com/alibaba/fastjson2/reader/ObjectReaderImplObject.java

@@ -160,6 +160,10 @@ public final class ObjectReaderImplObject
                     break;
                 }
 
+                if (jsonReader.current() == '/') {
+                    jsonReader.skipComment();
+                }
+
                 Object name;
                 if (i == 0 && typeName == null && hash != 0) {
                     name = jsonReader.getFieldName();

core/src/test/java/com/alibaba/fastjson2/issues_3700/Issue3719.java

@@ -0,0 +1,18 @@
+package com.alibaba.fastjson2.issues_3700;
+
+import com.alibaba.fastjson2.JSONArray;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class Issue3719 {
+    @Test
+    public void test() {
+        assertEquals("[{\"a\":700000,\"b\":1}]", JSONArray.parse("[{\n" +
+                "                    // 注释a\n" +
+                "                    \"a\":700000, \n" +
+                "                    // 注释b\n" +
+                "                    \"b\":1 \n" +
+                "                }]").toString());
+    }
+}