Java
import java.util.*;
public class BasicCollectionsExample {
public static void main(String[] args) {
List<String> list = new ArrayList<>();
list.add("Apple");
list.add("Banana");
list.add("Orange");
for (String item : list) {
System.out.println(item);
}
Set<Integer> set = new HashSet<>();
set.add(1);
set.add(2);
set.add(3);
if (set.contains(2)) {
System.out.println("Set contains 2");
}
Map<String, Integer> map = new HashMap<>();
map.put("Apple", 1);
map.put("Banana", 2);
map.put("Orange", 3);
for (Map.Entry<String, Integer> entry : map.entrySet()) {
System.out.println(entry.getKey() + ": " + entry.getValue());
}
}
}
