Start with the fundamentals, read a small example, and put what you learn into practice. A clear foundation makes the next project easier.
Explore the learning path →Variables, types, operators, conditions and loops. Learn how a Java program describes and solves a problem.
Classes, constructors, methods and interfaces. Group data and behavior into understandable building blocks.
Collections, exceptions and file handling. Work with lists and maps, handle errors and save your results.
Save this as HelloJava.java. With a JDK installed, compile it using javac HelloJava.java, then run java HelloJava.
public class HelloJava {
public static void main(String[] args) {
String language = "Java";
System.out.println("Hello, " + language + "!");
}
}The class name matches the file name. The main method is the entry point, and println writes a line to the console.
Build a command-line reading list. Store book titles in an ArrayList<String>, add new titles, and print the list. Then extend it with a menu and file storage.
Keep each step small: make it work, test an edge case, and improve the names before adding another feature.