public class Basics {                        // in file named "Basics.java"
    private int n;

    public Basics() {                        // default constructor
        this.n = 1;
    }
    public Basics(int n) {                   // another constructor
        this.n = n;                          // set a private variable
    }
    public void hello() {                    // a public method with no return
        for(int i = 0; i < n; i++) {
            System.out.println("Hello!");
        }
    }
   
    public static void main(String[] args) { // will be run from command line
        Basics b1 = new Basics(5);           // says hello 5 times
        Basics b2 = new Basics();            // say hello default num of times

        System.out.println("* b1");
        b1.hello();
        System.out.println("* b2");
        b2.hello();
    }
}