arrays - Java, How to split elements of a list? -

arrays - Java, How to split elements of a list? -

i'm trying split individual elements of string[] array. array looks

{"0 1 0 1", "0 0 1 1", "1 1 0 1",...}.

i want split each element regex " ", single space. if that, create 1 element "0 1 0 1" 4 elements "0", "1", "0", , "1"? here code adds elements list (reading text file rows of 4 digit numbers separated spaces) part using "split" method not working. not having impact on array produced. name of string[] array "splitted".

int j=0; string thisline = null; while(((thisline=readthrough.readline()) != null) && j<3){ splitted[j]= thisline; splitted[j].split(" "); j++; }

the split() method doesn't modify string in-place, have to assign returned string[] something. if want process values, seek this:

string[] array = {"0 1 0 1", "0 0 1 1", "1 1 0 1"}; list<string> reply = new arraylist<string>(); (string str : array) (string s : str.split(" ")) answer.add(s);

after loop runs, answer contain next string values:

[0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1]

optionally, if need output result array of strings can this:

string[] output = answer.toarray(new string[answer.size()]);

java arrays