Java Mastery Intermediate: Methods, Collections, and Beyond

Install Java step by step by downloading the latest JDK from Oracle. Set up the Windows x64 installer and verify the Java path.

Install and configure IntelliJ IDEA Community Edition from JetBrains for Java and Kotlin development, outlining download steps, system requirements, and setup tips for a smooth, local development environment.

learn how to call a static void method in Java from the main method, pass string outputs with System.out.println, and test multiple calls using an IDE and keyboard shortcuts.

Explore how to create a Java method with a parameter, pass string data as arguments, and print dynamic greetings using single and multiple parameters.

Use the return keyword to obtain values from Java methods instead of void. Call the methods from main, assign the result to a variable, and print it.

Practice creating a Java program that generates a ten-digit random number on every execution using java.util.Random. Build a reusable method and explore OTP and random password generation as use cases.

Explore the Java collections framework with array lists: add, get, and modify items; sort in ascending or descending order; read unknown sizes via loops and determine list size.

Learn to sort data in an array list using java.util.Collections.sort, importing the library and applying for loops or for-each loops to read sorted items.

Explore linked lists in Java Mastery, compare array list and linked list, and learn to declare, import libraries, and add, remove, or get first and last items with code.

learn to create a LinkedList using java.util.LinkedList, instantiate it, add country items, and print the list, highlighting its similarity to an array list.

Explore linked list operations by using built-in addFirst and addLast methods to insert items at the beginning or end, with practical examples using country data.

Explore linked list operations in Java by using built-in removeFirst and removeLast methods to remove the first and last items in a list.

Access items in a hash map by key using the get method, as shown with USA yielding New York City and Germany yielding Berlin.

Implement a Java HashMap to store student names and scores, using a scanner and a switch-case menu to add, retrieve, or exit.

Create a hash set that stores unique items by importing java.util.HashSet and instantiating it as a string collection named sports. Test by adding items to confirm the set enforces uniqueness.

Learn how to find the size of a hash set in Java using the size() method and print the result with System.out.println, counting the elements in the set.

Explore Java collections and learn to create and traverse a collection with an iterator, controlling the loop and reading items one by one, including removal operations.

Master looping through a collection by using an iterator with while and for loops, applying hasNext and next to print each item from an array list.

Learn to remove items from a group of collections using iterators and the remove method, avoiding for loops when size changes, with a while-loop example filtering numbers under 100.

Explore file handling in Java through the java.io.File class, learning to create, read, write, delete, and check files, with path names and text files.

Learn to write content to a text file in Java using FileWriter, covering path setup, the write method, and closing the writer in a try-catch block to handle IO exceptions.