public class Test3 {
    public static void main(String[] args) {
    Enveloppeur wrapper1 = new Enveloppeur(5);
    Enveloppeur wrapper2 = new Enveloppeur();
    System.out.println(wrapper1.getI());
    System.out.println(wrapper2.getI());
   
    Origin o = wrapper1.getO();
    wrapper2.setO(o);
    o=null;

    System.out.println(wrapper1.getI());
    System.out.println(wrapper2.getI());
   
    wrapper1.setI(6);
   
    System.out.println(wrapper1.getI());
    System.out.println(wrapper2.getI());
 }
}



class Enveloppeur {
private Origin o;
Enveloppeur(){
o = new Origin();   
}
Enveloppeur(int i){
    o = new Origin(i);   
}
public void setI(int i) {
    o.setOrigin(i);
}
public int getI() {
    return o.getOrigin();
}
public Origin getO() {
   
    return o;
}
public void setO(Origin o) {
    this.o=o;
}
}
   



class Origin { //wrapper
private int i;
Origin(){
    }
   
Origin(int i){
    setOrigin(i);
}
void setOrigin(int i){
    this.i=i;
}
int getOrigin(){
    return i;
}
}