actv.docx

LL1.java import java.util.LinkedList; public class LL1 { public static void main(String[] args) { LinkedList<String> planet = new LinkedList<String>(); planet.add("Mercury"); planet.add("VENUS"); planet.add("Earth"); planet.addFirst("Mars"); System.out.println(planet); } } LL2.java impor...

LL1.java import java.util.LinkedList; public class LL1 { public static void main(String[] args) { LinkedList<String> planet = new LinkedList<String>(); planet.add("Mercury"); planet.add("VENUS"); planet.add("Earth"); planet.addFirst("Mars"); System.out.println(planet); } } LL2.java import java.util.LinkedList; public class Main { public static void main(String[] args) { LinkedList<String> planet = new LinkedList<String>(); planet.add("Mercury"); planet.add("VENUS"); planet.add("Earth"); planet.addLast("Mars"); System.out.println(planet); } } LL3.java import java.util.LinkedList; public class Main { public static void main(String[] args) { LinkedList<String> planet = new LinkedList<String>(); planet.add("Mercury"); planet.add("VENUS"); planet.add("Earth"); planet.add("Mars"); planet.removeFirst(); System.out.println(planet); } } LL4.java import java.util.LinkedList; public class Main { public static void main(String[] args) { LinkedList<String> sim = new LinkedList<String>(); sim.add("Smart"); sim.add("TNT"); sim.add("Globe"); sim.add("Dito"); sim.removeLast(); System.out.println(sim); } } LL5.java import java.util.LinkedList; public class Main { public static void main(String[] args) { LinkedList<String> sim = new LinkedList<String>(); sim.add("Smart"); sim.add("TNT"); sim.add("Globe"); sim.add("Dito"); System.out.println(sim.getLast()); }} HM1.java import java.util.HashMap; public class Main { public static void main(String[] args) { HashMap<String, String> capitalCities = new HashMap<String, String>(); capitalCities.put("England", "London"); capitalCities.put("Germany", "Berlin"); capitalCities.put("Norway", "Oslo"); capitalCities.put("USA", "Washington DC"); System.out.println(capitalCities); } } HM2.java import java.util.HashMap; public class Main { public static void main(String[] args) { HashMap<String, String> capitalCities = new HashMap<String, String>(); capitalCities.put("England", "London"); capitalCities.put("Germany", "Berlin"); capitalCities.put("Norway", "Oslo"); capitalCities.put("USA", "Washington DC"); System.out.println(capitalCities.get("England")); } } HM3.java import java.util.HashMap; public class Main { public static void main(String[] args) { HashMap<String, String> capitalCities = new HashMap<String, String>(); capitalCities.put("England", "London"); capitalCities.put("Germany", "Berlin"); capitalCities.put("Norway", "Oslo"); capitalCities.put("USA", "Washington DC"); capitalCities.remove("England"); System.out.println(capitalCities); }} HM4.java import java.util.HashMap; public class Main { public static void main(String[] args) { HashMap<String, String> capitalCities = new HashMap<String, String>(); capitalCities.put("England", "London"); capitalCities.put("Germany", "Berlin"); capitalCities.put("Norway", "Oslo"); capitalCities.put("USA", "Washington DC"); for (String i : capitalCities.keySet()) { System.out.println(i); } }} HM5.java import java.util.HashMap; public class Main { public static void main(String[] args) { HashMap<String, String> capitalCities = new HashMap<String, String>(); capitalCities.put("England", "London"); capitalCities.put("Germany", "Berlin"); capitalCities.put("Norway", "Oslo"); capitalCities.put("USA", "Washington DC"); for (String i : capitalCities.keySet()) { System.out.println("key: " + i + " value: " + capitalCities.get(i)); } } } HM6.java import java.util.HashMap; public class Main { public static void main(String[] args) { // Create a HashMap object called people HashMap<String, Integer> people = new HashMap<String, Integer>(); // Add keys and values (Name, Age) people.put("John", 32); people.put("Steve", 30); people.put("Angie", 33); for (String i : people.keySet()) { System.out.println("Name: " + i + " Age: " + people.get(i)); }}} HS1.java import java.util.HashSet; public class Main { public static void main(String[] args) { HashSet<String> cars = new HashSet<String>(); cars.add("Volvo"); cars.add("BMW"); cars.add("Ford"); cars.add("BMW"); cars.add("Mazda"); System.out.println(cars.contains("Mazda")); }} HS2.java import java.util.HashSet; public class Main { public static void main(String[] args) { HashSet<String> cars = new HashSet<String>(); cars.add("Volvo"); cars.add("BMW"); cars.add("Ford"); cars.add("BMW"); cars.add("Mazda"); for (String i : cars) { System.out.println(i); }}} HS3.java // Import the HashSet class import java.util.HashSet; public class Main { public static void main(String[] args) { // Create a HashSet object called numbers HashSet<Integer> numbers = new HashSet<Integer>(); // Add values to the set numbers.add(4); numbers.add(7); numbers.add(8); // Show which numbers between 1 and 10 are in the set for(int i = 1; i <= 10; i++) { if(numbers.contains(i)) { System.out.println(i + " was found in the set."); } else { System.out.println(i + " was not found in the set."); } } }}