You must be very strong in Java DS to write comparisons between various Collection classes. This tutorial gives you possible Java DS comparisons.
- Enumeration vs Iterator
- Iterator vs ListIterator
- Vector vs ArrayList
- Array vs ArrayList
- for vs foreach
- Hashtable vs HashMap
- Set vs HashSet
- Map vs HashMap
- HashMap vs TreeMap
- Comparable vs Comparator
- HashSet vs HashMap
- HashSet vs TreeSet
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