Last Object Inserted into Vector Appears in Every Position

Question

I am experiencing difficulty with adding objects to vectors. The object that is added last appears in all locations in the vector, from 0 to size-1. The below program illustrates my problem. I expect it to print
A 1
B 2
C 3
D 4
Yet it prints
D 4
D 4
D 4
D 4
If anyone has some advice, I would greatly appreciate it. Thank you.
import java.io.*;
import java.util.*;
class CharAndInt
  private static char x;
  private static int y;
  public CharAndInt(char a, int b)
    x = a;
    y = b;
  public char getX()
    return x;
  public int getY()
    return y;
class Test
  private static Vector v;
  public static void addToV (char a, int b)
    CharAndInt tmp = new CharAndInt(a, b);
    v.add(tmp);
  public static void main (String args[]) throws IOException
    v = new Vector();
    char arrC [] = { 'A', 'B', 'C', 'D' };
    int arrI [] = { 1, 2, 3, 4 };
    CharAndInt tmp;
    for (int i = 0; i < 4; ++i)
      addToV(arrC, arrI[i]);
for (int i = 0; i < 4; ++i)
tmp = (CharAndInt) v.get(i);
System.out.println(tmp.getX() + " " + tmp.getY());
Message was edited by:
blueicemd

Answer 1

In ther CharAndInt class you have made x and y static. They
shouldn't be.