java.lang.ClassCastException: java.util.HashSet cannot be cast to java.lang.Comparable

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    Y3X | Just another WordPress site | Page 3

    y3x.ru | 11 months ago
    java.lang.ClassCastException: Box cannot be cast to java.lang.Comparable

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    Root Cause Analysis

    1. java.lang.ClassCastException

      java.util.HashSet cannot be cast to java.lang.Comparable

      at java.util.PriorityQueue.siftUpComparable()
    2. Java RT
      PriorityQueue.add
      1. java.util.PriorityQueue.siftUpComparable(PriorityQueue.java:652)
      2. java.util.PriorityQueue.siftUp(PriorityQueue.java:647)
      3. java.util.PriorityQueue.offer(PriorityQueue.java:344)
      4. java.util.PriorityQueue.add(PriorityQueue.java:321)
      4 frames
    3. attempt1
      PQTest.main
      1. attempt1.PQTest.main(PQTest.java:11)
      1 frame