kristofer/JavaExercism: lots of exercises in java... from https://github.com/exercism/java

lots of exercises in java... from https://github.com/exercism/java

Stuart Kent 6599e32896 list-ops: update to match Kotlin track Based on v1.0.0 of the canonical data: https://github.com/exercism/problem-specifications/tree/28a32203b96ebaecac6a6968831bd66718d8ba30/exercises/list-ops Plus modifications that are being discussed in https://github.com/exercism/problem-specifications/issues/826		9 lat temu
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example/java	list-ops: update to match Kotlin track	9 lat temu
main/java	list-ops: update to match Kotlin track	9 lat temu
test/java	list-ops: update to match Kotlin track	9 lat temu