1．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；

<span style="font-size: 16px;">import java.util.Scanner; import java.util.StringTokenizer; import static java.lang.Integer.parseInt; import static java.util.Arrays.sort; public class Test { 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(); } return result; } public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println("输入n个数字，以指定符号分开"); args = splitStringByComma(scanner.next()); sort(args); for (int i = 0; i < args.length; i++) { System.out.print(i == args.length - 1 ? parseInt(args[i]) : parseInt(args[i]) + ","); } } } </span>