java - Getting the opposite numbers or getting IndexOutOfBoundException -


when string layout following:

string layout =       "b....\n"+       ".....\n"+       "....b\n"+       "";

then code reads number of rows , columns wrong. row number shows me column number , vice versa. above example, number of rows 3 , columns 5. im getting indexoutofboundsexception when test examples and/or opposite numbers (instead of rows number shows columns number, , instead of columns shows rows number). smb take @ logic of code?

public static shape makeshape(string layout,char displaychar)   {       shape passlayout;       int rows = 0;       int cols = 0;       string line = "";       string firstline = "";       string lastline = "";       scanner data = new scanner(layout);       firstline = data.nextline();        while(data.hasnextline())       {           line = data.nextline();           cols = line.length();           rows++;       }       //line = data.nextline();       lastline = line;       if((firstline.charat(0) == '.' && lastline.charat(0) == '.') ||                (firstline.charat(cols) == '.' && lastline.charat(cols) == '.'))           throw new fititexception("oops! empty borders!");       else            passlayout = new createshape(rows, cols, displaychar, layout);        return passlayout;

note: conditional if-statement checks empty chars ('.'), i.e. layout strings shapes must have @ least 1 filled block in each of 0th row, 0th column, last row, , last column.

i'm not seeing code mixing values rows , columns, see cause of indexoutofboundsexception. try changing if statement:

if((firstline.charat(0) == '.' && lastline.charat(0) == '.') ||            (firstline.charat(cols-1) == '.' && lastline.charat(cols-1) == '.'))       throw new fititexception("oops! empty borders!");

the position of last character 1 less number of columns because of 0 based index.


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