Java list intersection and set of differences set to repeat and set

First define two list

List List1 =NewArrayList (); List1.add ("1111"); List1.add ("2222"); List1.add ("3333"); List List2=NewArrayList (); List2.add ("3333"); List2.add ("4444"); List2.add ("5555");

Run:

           for (int0; i < list1.size (); i++) {               System. out. println (List1.  Get(i));           }

and set

List1.addall (LIST2);

Results:

1111 2222 3333 3333 4444 5555

Intersection

List1.retainall (LIST2);

Results:

3333

Subtraction

List1.removeall (LIST2);

Results:

1111 2222

No duplicate and set

List2.removeall (List1); List1.addall (LIST2);

Results:

1111 2222 3333 4444 5555

Java list intersection and set of differences set to repeat and set