import java.util.Collections;
import java.util.Vector;
public class Main {
public static void main(String[] args) {
Vector v = new Vector();
v.add("A");
v.add("B");
v.add("A");
v.add("C");
v.add("D");
System.out.println(v);
Collections.replaceAll(v, "A", "Replace All");
System.out.println(v);
}
}