import java.util.Collections; import java.util.Vector; public class Main { public static void main(String[] args) { Vector<String> v = new Vector<String>(); 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); } }