java.lang.NullPointerException

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    java.lang.NullPointerException
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Root Cause Analysis

  1. java.lang.NullPointerException

    No message provided

    at java.lang.String.compareTo()
  2. Java RT
    Arrays.sort
    1. java.lang.String.compareTo(Unknown Source)
    2. java.lang.String.compareTo(Unknown Source)
    3. java.util.Arrays.mergeSort(Unknown Source)
    4. java.util.Arrays.sort(Unknown Source)
    4 frames
  3. Unknown
    DecisionTree.<init>
    1. DecisionTree.calculatesplit(DecisionTree.java:146)
    2. DecisionTree.<init>(DecisionTree.java:42)
    2 frames