java:Arrays类
//public static String toString(数组) //将参数数组变为字符串
//public static void sort(数组) //将数组进行升序排序
//将字符串转换为数组在进行排序 public static void main(String[] args) { Scanner sc=new Scanner(System.in); System.out.println("请输入一串字符:"); String s=sc.next(); //将字符串变为数组 char[] ch=s.toCharArray(); //进行升序排序 Arrays.sort(ch); System.out.println("排序前:"); for (int i = 0; i < ch.length; i++) { System.out.print(ch[i]+"\t"); } System.out.println("降序排序后:"); for (int i = ch.length - 1; i >= 0; i--) { System.out.print(ch[i]+"\t"); }
https://www.cnblogs.com/xudong-bupt/p/3168618.html