[Octave-bug-tracker] [bug #51804] java-9: java.base/java.lang.Double cannot be cast to java.base/java.lang.Integer

[Mike Miller]

Follow-up Comment #6, bug #51804 (project octave):

Ok, this may be the problem


x = javaObject ("java.lang.Integer", 0)
methods (x)


With Java 8, the list contains


  [1,13] = int compareTo(java.lang.Integer)
  [1,14] = int compareTo(java.lang.Object)


in that order. So when Octave iterates through the available methods, it finds
the Integer one first, and everything works as expected. With Java 9, I get
the following


  [1,13] = int compareTo(java.lang.Object)
  [1,14] = int compareTo(java.lang.Integer)


in the opposite order. Octave finds the one that takes an Object first,
assumes that that should work when given a double-valued argument, and calls
it. If that method actually exists and works, then this should work. But it's
like Java is reporting that this compareTo(Object) method exists, but when
it's called it is actually calling the one that takes an Integer.

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