java - How to save integers from a .txt file into an array? -

so have array int[] numbers = {1,2}; want 1,2 removed , replaced numbers txt file. can see numbers files in console method:

public string[] readlines(string filename) throws ioexception {     filereader filereader = new filereader(filename);     bufferedreader bufferedreader = new bufferedreader(filereader);     list<string> lines = new arraylist<string>();     string line = null;     while ((line = bufferedreader.readline()) != null) {         lines.add(line);     }     bufferedreader.close();     return lines.toarray(new string[lines.size()]); }  public static void testfilearrayprovider() throws ioexception {     algo1 fap = new algo1();     string[] lines = fap             .readlines("d:/users/xxx/workspace/abc/src/abc1/filename123");     (string line : lines) {         system.out.println(line);     } } 

now need save them in array. how? xd thx guys

this should work:

   // in case populated    string[] lines = new string[] {"123", "4567"};       // easier work lists first     list<integer> results = new arraylist<>();     (string line : lines) {         results.add(integer.parseint(line));     }      // if want int[] reason     int[] finalresults = new int[results.size()];      (int = 0; < results.size(); i++) {         finalresults[i] = results.get(i);     }      // prove worked     system.out.println(arrays.tostring(finalresults)); 

in java-8, can shorten to

int[] finalresults = arrays.stream(lines).maptoint(integer::parseint).toarray();