How to work with sets?

[Bob Zoloman]

I'm new to java, and i only have experience using array type data structures. How can I store multiple sets within a set?

Ex: Store the following sets in HashSet1

[2, 25] - set 1
[4, 64, 2, 1] - set 2
[7, 3, 12, 0] - set 3

Each of the above is a unique set, so how can I store them in a hashset and access each set individually, so they printout like the above? Any help is appreciated.

[Richard Green]

[2, 25] - set 1
[4, 64, 2, 1] - set 2
[7, 3, 12, 0] - set 3

 
    Set<Integer> set1 = new HashSet<Integer>();
    Set<Integer> set2 = new HashSet<Integer>();
    Set<Integer> set3 = new HashSet<Integer>();
    
    set1.add(2); set1.add(25);
    set2.add(4); set2.add(64); set2.add(2); set2.add(1);
    set3.add(7); set3.add(3); set3.add(12); set3.add(0);
    
    Set<Set<Integer>> container = new HashSet<Set<Integer>>(); // a set containing set of integers
    container.add(set1);
    container.add(set2);
    container.add(set3);
    
    System.out.println(container);
    

[Bob Zoloman]

ty for your help.