question: public static SparseMatrix loadSparseMatrix ( File file ) throws IOException , IllegalFormatException { String str ; TextFileReader reader = new TextFileReader ( file ) ; str = reader . readLine ( ) ; String [ ] parts = str . split ( "\\s+" ) ; if ( parts . length != 2 ) throw new IllegalFormatException ( ) ; int rows = Integer . parseInt ( parts [ 0 ] ) ; int cols = Integer . parseInt ( parts [ 1 ] ) ; SparseMatrix matrix = new SparseMatrix ( rows , cols ) ; while ( ( str = reader . readLine ( ) ) != null ) { parts = str . split ( "\\s+" ) ; if ( parts . length != 3 ) throw new IllegalFormatException ( ) ; int row = Integer . parseInt ( parts [ 0 ] ) ; int col = Integer . parseInt ( parts [ 1 ] ) ; double value = Double . parseDouble ( parts [ 2 ] ) ; matrix . add ( row , col , value ) ; } reader . close ( ) ; return matrix ; }
target:  The first line of the input file should be "rows cols", and the following line should be "rowIndex colIndex value"