java.lang.NullPointerException

Oracle Community | 807546 | 1 decade ago
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    HELP pls!!!!! writeObject caused Stack Overflow?

    Oracle Community | 1 decade ago | 807546
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at remulac.BridgeColl.TreeNode.hashCode()
    2. remulac.BridgeColl
      TreeNode.hashCode
      1. remulac.BridgeColl.TreeNode.hashCode(TreeNode.java:147)
      1 frame
    3. Java RT
      ObjectInputStream.readObject
      1. java.util.Hashtable.put(Hashtable.java:394)
      2. java.util.Hashtable.readObject(Hashtable.java:838)
      3. sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
      4. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      5. java.lang.reflect.Method.invoke(Method.java:324)
      6. java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:824)
      7. java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
      8. java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
      9. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
      10. java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
      11. java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
      12. java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
      13. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
      14. java.io.ObjectInputStream.readArray(ObjectInputStream.java:1603)
      15. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1271)
      16. java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
      17. java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
      18. java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
      19. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
      20. java.io.ObjectInputStream.readArray(ObjectInputStream.java:1603)
      21. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1271)
      22. java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
      23. java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
      24. java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
      25. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
      26. java.io.ObjectInputStream.readArray(ObjectInputStream.java:1603)
      27. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1271)
      28. java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
      29. java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
      30. java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
      31. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
      32. java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
      33. java.util.Hashtable.readObject(Hashtable.java:836)
      34. sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
      35. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      36. java.lang.reflect.Method.invoke(Method.java:324)
      37. java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:824)
      38. java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
      39. java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
      40. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
      41. java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
      42. java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
      43. java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
      44. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
      45. java.io.ObjectInputStream.readArray(ObjectInputStream.java:1603)
      46. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1271)
      47. java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
      48. java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
      49. java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
      50. java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
      51. java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
      51 frames
    4. remulac.BridgeColl
      BridgeCollector.main
      1. remulac.BridgeColl.Topology.<init>(Topology.java:1504)
      2. remulac.BridgeColl.BridgeCollector.<init>(BridgeCollector.java:40)
      3. remulac.BridgeColl.BridgeCollector.main(BridgeCollector.java:221)
      3 frames