Error Handling in Java: A Complete Guide with Examples

Data Structures in Java
1. Arrays
 An array is a fixed-size data structure that stores elements of the same
type.
 It allows random access to elements, which makes it efficient for accessing
data by index.

Example:

public class Main {
public static void main(String[] args) {
int[] numbers = {1, 2, 3, 4, 5};
System.out.println(numbers[2]); // Output: 3
}
}

Important Points:

 Fixed size (cannot be resized once created).
 Elements can be of any data type.



2. ArrayList
 An implementation of the List interface, part of the Collections Framework.
 It allows dynamic resizing (grows as elements are added).
 Unlike arrays, an ArrayList can be resized during runtime.

Example:

import java.util.ArrayList;

public class Main {
public static void main(String[] args) {
ArrayList<String> list = new ArrayList<>();

, list.add("Apple");
list.add("Banana");
list.add("Cherry");

System.out.println(list.get(1)); // Output: Banana
}
}

Important Points:

 Resizable array implementation.
 Allows duplicates.
 Supports indexed access, and insertion and removal of elements.



3. LinkedList
 Implements the List and Deque interfaces.
 It is a doubly linked list, which means each element is connected to both
the next and previous element.
 Offers faster insertion and deletion operations compared to ArrayList,
especially in the middle of the list.

Example:

import java.util.LinkedList;

public class Main {
public static void main(String[] args) {
LinkedList<String> list = new LinkedList<>();
list.add("Java");
list.add("Python");
list.add("C++");

list.addFirst("HTML");
System.out.println(list.getFirst()); // Output: HTML
}