private Integer conect_helper ( String line , int start , int end ) { if ( line . length ( ) < end ) return null ; String sbond = line . substring ( start , end ) . trim ( ) ; int bond = - 1 ; Integer b = null ; if ( ! sbond . equals ( "" ) ) { bond = Integer . parseInt ( sbond ) ; b = new Integer ( bond ) ; } return b ; }
safes repeating a few lines ...