How can I print an Object of a Vector when this last is into a Main-Vector?

How can I print a Vector that is into a Vector (main). I made a program that contains a vector of stacks (java.util), inside the package I have two classes: -Stack, -mainProgram; The Stack class will create the object though a Vector (java.util) with the following methods: pop,push,peek,isEmpty,search,print. I did everything but I don't know how to print the stack contained in the Vector (main) with Its elements, where I should be able to add,remove,search and print the stacks.

Example of what I mean:

The print of the stacks that I wanna print should be like this -->

---

Stack 1:
10
20
30
40
50
60

---

Stack 2:
1
2
3
4
5

---

Stack 3:
100
110
120
130

Do you have any advice?

You shouldn't be using the Vector class anymore, as it has become a legacy class many years ago.

If you need to implement a stack, your best choice would be an ArrayDeque.

This class is likely to be faster than Stack when used as a stack

However, if using Vector is a constraint, you can simply print your elements with two nested for loops. In my example, I've assumed that your innermost Vector contains strings.

public void print(Vector<Vector<String>> vet){
    int i = 0;
    for (Vector<String> v : vet) {
        System.out.printf("Stack %d:%n", ++i);
        for (String s : v) {
            System.out.println(s);
        }
        System.out.println();
    }
}

Instead, the implementation with an ArrayDeque would look like this:

public void print(ArrayDeque<ArrayDeque<String>> vet){
    int i = 0;
    for (ArrayDeque<String> v : vet) {
        System.out.printf("Stack %d:%n", ++i);
        for (String s : v) {
            System.out.println(s);
        }
        System.out.println();
    }
}