| import java.util.* | |
| fun foo() { | |
| val al = ArrayList<String>() | |
| al.size | |
| al.contains(1) | |
| al.contains("") | |
| al.remove("") | |
| al.removeAt(1) | |
| val hs = HashSet<String>() | |
| hs.size | |
| hs.contains(1) | |
| hs.contains("") | |
| hs.remove("") | |
| val hm = HashMap<String, Int>() | |
| hm.size | |
| hm.containsKey(1) | |
| hm.containsKey("") | |
| hm[1] | |
| hm[""] | |
| hm.remove("") | |
| } |