[Java] Statements

public class Statements {

    public static void main(String[] args)
    {
        int r = (150-20) / 2 + 5;

        double surFace = Math.PI*r*r;

        double perimeter = 2 * Math.PI*r;

        System.out.println(r);
        System.out.println(surFace);
        System.out.println(perimeter);

        System.out.println();

        int a = 5;
        int b = ++a;

        System.out.println(a); //6
        System.out.println(b); //6
    }

}