JAVA PROGRAMMING EXAMPLES
Here are the programming examples of JAVA which are discussed in the video lecture of Advanced JAVA programming.
Concept of Collection and Interface Introductory program
import java.util.*;
public class CollectionInterfaceExample {
public static void main(String[] args) {
// Creating a List
List<String> namesList = new ArrayList<>();
namesList.add("Yeshwant ");
namesList.add("Mahavidyalaya");
namesList.add("Nanded");
namesList.add("(MS)");
System.out.println("List elements:");
for (String name : namesList) {
System.out.println(name);
}
// Creating a Set
Set<Integer> numbersSet = new HashSet<>();
numbersSet.add(10);
numbersSet.add(20);
numbersSet.add(10); // Duplicate value, will be ignored
System.out.println("\nSet elements:");
for (int number : numbersSet) {
System.out.println(number);
}
// Creating a Queue
Queue<String> queue = new LinkedList<>();
queue.add("First");
queue.add("Second");
queue.add("Third");
System.out.println("\nQueue elements:");
while (!queue.isEmpty()) {
System.out.println(queue.poll()); // Retrieves and removes the head of the queue
}
}
}
Concept of ArrayList in JAVA
import java.util.ArrayList;
public class ArrayListExample {
public static void main(String[] args) {
// Creating an ArrayList of integers
ArrayList<Integer> numbers = new ArrayList<>();
// Adding elements to the ArrayList
numbers.add(10);
numbers.add(20);
numbers.add(30);
numbers.add(40);
// Displaying the elements in the ArrayList
System.out.println("Elements in the ArrayList:");
for (int number : numbers) {
System.out.println(number);
}
// Accessing elements by index
int firstNumber = numbers.get(0);
System.out.println("First element: " + firstNumber);
// Modifying an element
numbers.set(1, 25);
System.out.println("Modified ArrayList:");
System.out.println(numbers);
// Removing an element by value
numbers.remove(Integer.valueOf(30));
System.out.println("After removing 30:");
System.out.println(numbers);
// Checking if an element exists
boolean contains40 = numbers.contains(50);
System.out.println("Contains 50? " + contains40);
// Size of the ArrayList
int size = numbers.size();
System.out.println("Size of ArrayList: " + size);
// Clearing all elements
numbers.clear();
System.out.println("After clearing:");
System.out.println(numbers);
// Checking if the ArrayList is empty
boolean isEmpty = numbers.isEmpty();
System.out.println("Is ArrayList empty? " + isEmpty);
}
}
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