Map in Java

Short summary

Tutorial explaining Java's Map collection interface and its implementations: HashMap (fast, unordered), LinkedHashMap (insertion-ordered), and TreeMap (sorted). Demonstrates core operations including put(), get(), remove(), and iteration patterns with code examples for each data structure variant.

• •Maps store key-value pairs with unique keys and optional duplicate values
• •Three implementations: HashMap (fast), LinkedHashMap (ordered), TreeMap (sorted)
• •Essential methods: put(), get(), remove(), containsKey(), iteration via keySet(), values(), entrySet()

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