Exception in thread "main" java.io.InvalidClassException: Ideone$Test; no valid constructor
at java.io.ObjectStreamClass$ExceptionInfo.newInvalidClassException(ObjectStreamClass.java:147)
at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:755)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
at Ideone.main(Main.java:36)