you are trying to print array like this System.out.println(array). use for loop

Its not a hascode but an adress of Array in Heap where link is point and array is allocated

It is not a double array. It is array[key] construct, where the array content is 'silver' => 10, 'gold' => 5, null => 20 and the key that is accessed is the result of @$bands[3].

@damiansakwinski

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Glad I could help.

Not totally sure what you are doing, but that sounds like you're getting the hashcode of the array.
https://stackoverflow.com/questions/409784/whats-the-simplest-way-to-print-a-java-array
If you're trying to debug by using print or similar methods on the array, that won't work. Use Arrays.toString(arr) instead to get the string representation of the array.