Java.Collections.How to iterate over all values ​​in a Map?

✅ 1. Enhanced for loop using map.values()

Map<String, Integer> map = new HashMap<>();
map.put("apple", 1);
map.put("banana", 2);

for (Integer value : map.values()) {
    System.out.println("Value = " + value);
}

• map.values() returns a Collection<V> of all the values.
• This is the simplest and most common way.

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✅ 2. Using an Iterator

Iterator<Integer> iterator = map.values().iterator();
while (iterator.hasNext()) {
    Integer value = iterator.next();
    System.out.println("Value = " + value);
}

Useful if you want to remove values during iteration (with iterator.remove()).

✅ 3. Java 8+ forEach() with lambda

map.values().forEach(value -> System.out.println("Value = " + value));

• A concise, functional-style approach.

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✅ 4. Stream API (for filtering or processing)

map.values().stream()
   .filter(value -> value > 1)
   .forEach(System.out::println);

• Great for more advanced tasks like filtering, mapping, collecting, etc.

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🧠 TL;DR

Approach	Code
For-each loop	for (V value : map.values())
Iterator	Iterator<V> it = map.values().iterator()
Lambda	map.values().forEach(...)
Stream	map.values().stream()...