Can java sort letters?

The code for sorting letters in java is as follows: (Recommended: java video tutorial)

package lianxi.Demo;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

/**
 * （对字母进行排序，如：s,a,g,d,b; 控制台输入 a b d g s）
 */
public class DemoSort
{
public static void main(String[] args)
{
    //定义一个Scanner变量，键盘录入数据
    Scanner sc = new Scanner(System.in);
    System.out.println("请输入你需要排序的字母（A-Z）,（a-z）或者数字：");
    String ch = sc.nextLine();
    //定义一个List集合，用来存储录入的数据
    List list =new ArrayList();
    //遍历
    for (int i = 0; i <ch.length() ; i++)
    {
        //截取每一个字母
        String st = ch.substring(i,i+1);
        //将截取到的字符添加到list集合中
        list.add(st);
    }
    //对字母进行排序
    java.util.Collections.sort(list);
    System.out.println("排序前的字母为："+ch);
    System.out.println("排序后的字母为："+list);
}
}

Use the sort() method for java sorting:

There is a sort() method in the java.util.Collections class, which is mainly used to sort arrays. The sorting rules can be rewritten by yourself.

The substring() method returns the substring of a string.

Grammar

public String substring(int beginIndex)

or

public String substring(int beginIndex, int endIndex)

For more java knowledge, please pay attention to the java basic tutorial column.

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