Advanced Programming

Classes have the form:

public class ClassName {
}

Instantiate classes with new:

ClassName instance = new ClassName();

The name of the Java file should match the class name. One (main) class per file.

Access variables via dot syntax: car.brand

Instance variables are declared in the body of a class. static variables and methods are class variables/methods.

Constructors are public, and have the same name as the class:

public class Main {
    int x;

    public Main() {
        x = 42;
    }

    public static void main(String[] args) {
        Main myMain = new Main();
        System.out.printf("The constructor sets the value: %d", myMain.x); // 42
    }
}

There are no destructors, as Java is garbage-collected.