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Java Collections Hierarchy

How are collections available

Collections in java are available as class and interfaces Folling are few commonly used collections in java :

ArrayList -> For variables size collections
Set -> For distinct collection
Stack-> A LIFO data structure
HashMap -> For strong key - value pairs

Collections class is available in java util package collection class also provides static methods for sorting , searching etc.



import java.util.ArrayList;
import java.util.Set;
import java.util.TreeSet;

public class cwh_89_collections {
    public static void main(String[] args) {
        // ArrayList
        // Set
        // TreeSet


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