/**
 * PAss an object reference in Java
 * When passed, the var holding the reference can be updated, but that
 * change is not reflected outsize the function. 
 * This means that the pointer is, in some sense, pass-by-value.
 * Scott calls this pass by sharing. 
 * @author gtowell
 * Created: November 2021
 */
public class PassRef {
    public int aa = 5;

    public static void main(String[] args) {
        new PassRef().doo();
    }

    public void doo() {
        PassRef pr = new PassRef();
        pr.aa = 7;
        System.out.println(String.format("PR bef %d", pr.aa));
        ado(pr);
        System.out.println(String.format("PR aft %d", pr.aa));
    }

    private void ado(PassRef pado) {
        pado.aa = 9;
        pado = new PassRef();
        pado.aa = 99;
    }
}