Vectors - editing objects

Question

If i have an object and 2 vectors like below:
obj O = new obj;
vector V1 = new Vector();
vector V2 = new Vector();
if i then add the obj to both vectors
V1.add(O);
V2.add(O);
then later on if i return O from V1 and edit it, eg.
obj temp = (obj) V1.get(i);
if i edit temp, does this affect ) which has been added to V2 also?

Answer 1

yepHow?
// Author:           Annie the Looney
import java.util.*;
class Test3
     public static void main(String[] a){
          Test3 x = new Test3();
          x.test();
     public void test(){
          ArrayList one = new ArrayList();
          ArrayList two = new ArrayList();
          Person p = new Person("Annie");
          one.add(p);
          two.add(p);
          p = new Person("walker");
          one.add(p);
          two.add(p);
          System.out.println("Collection one");
          for(int i=0;i<one.size();i++){
               System.out.println(one.get(i));
          System.out.println("Collection two");
          for(int i=0;i<two.size();i++){
               System.out.println(one.get(i));
          for(int i=0;i<one.size();i++){
               p = (Person)one.get(i);
               p.setName("nobody");
          System.out.println("Collection one");
          for(int i=0;i<one.size();i++){
               System.out.println(one.get(i));
          System.out.println("Collection two");
          for(int i=0;i<two.size();i++){
               System.out.println(one.get(i));
          System.out.println("what happened to annie");
     private class Person{
          private String name;
          public Person(String name){
               this.name = name;
          public void setName(String name){
               this.name = name;
          public String toString(){
               return "I am a person named "+name;