Modify a String element of a Vector String Array

static void foo(){
  
  Vector<String []> vector = new Vector<String []>();
  
  String array1[] = {"word1","word2","word3"};
  String array2[] = {"word4","word5","word6"};
  String array3[] = {"word7","word8","word9"};
  
  vector.add(array1);
  vector.add(array2);
  vector.add(array3);
  
  printall(vector);
   
  String newarray[] = vector.get(1);
  newarray[0]="newword";
  
  printall(vector);
  
 }
 
 static void printall(Vector<String []> vector){
 
        System.out.println("\n");
    
        for(int i =0; i < vector.size();i++){
    
            for(int j=0; j < vector.get(i).length ; j++){
            System.out.println(vector.get(i)[j]); 
            }
        
    }