/*现在输入 n 个数字， 以逗号， 分开； 然后可选择升或者降序排序； */import java.util.*;public class bycomma{    public static String[] splitStringByComma(String source){        if(source==null||source.trim().equals("")){            return null;        }        StringTokenizer commaToker = new StringTokenizer(source,",");        String[] result = new String[commaToker.countTokens()];        int i=0;        while(commaToker.hasMoreTokens()){            result[i] = commaToker.nextToken();            i++;        }            return result;    }    public static void main(String args[]){        String[] s = splitStringByComma("5,8,7,4,3,9,1");        int[] ii = new int[s.length];        for(int i = 0;i<s.length;i++){            ii[i] =Integer.parseInt(s[i]);        }                Arrays.sort(ii);        //asc        for(int i=0;i<ii.length;i++){            System.out.println(ii[i]);        }        //desc        for(int i=(s.length-1);i>=0;i--){            System.out.println(ii[i]);        }    }}