public boolean isAbsolute(){
  return path.length() > 0 && path.charAt(0) == separatorChar;
}

public boolean isAbsolute ( ) { return path . length ( ) > 0 && path . charAt ( 0 ) == separatorChar ; }
indicates if this file ' s pathname is absolute . whether a pathname is absolute is platform specific . on android , absolute paths start with the character ' / ' .
