java--array into list,list

The array is turned into a list:

Method One:

string[] UserID = {"AA", "BB", "CC"};

list<string> userlist = new arraylist<string> ();

Collections.addall (UserList, UserID);

Method Two:

string[] UserID = {"AA", "BB", "CC"};

List<string> userlist = arrays.aslist (userid);

Another:arrays.aslist () returns a list of fixed sizes supported by the specified array. Therefore, do not do add, remove and other operations.

List List = new ArrayList (arrays.aslist (userid));

Method Three:

string[] UserID = {"AA", "BB", "CC"};

list<string> userlist = new arraylist<string> (userid.length);

for (String Uid:userid) {

Userlist.add (UID);

}

List Conversion array:

Method One:

list<string> strlist = new arraylist<string> ();

Strlist.add ("AA");

Strlist.add ("BB");

object[] Objs = Strlist.toarray ();

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If you want to become a string array, you need a strong turn type.

String[] STRs = (string[]) Strlist.toarray ();

You can also specify the size:

final int size = Strlist.size (); String[] STRs = (string[]) Strlist.toarray (new string[size]);

Method Two:

list<string> strlist = new arraylist<string> ();

Strlist.add ("AA");

Strlist.add ("BB");

string[] STRs = new string[strlist.size ()];

java--array into list,list