Java - 按字长对字符串数组进行排序

Question

我需要按字长将String数组排序到最小到最大的顺序。然后我需要打印出它们旁边的单词。

示例输出：

1：我，你，K

6：约瑟夫，删除

但我需要帮助排序数组。

代码：

package Objects;

import java.io.*;
import java.util.*;
import java.util.Arrays;
import java.lang.Object;

public class WordLength {

public static void main(String[] args) throws Exception{

    Scanner scan = new Scanner(new File("wordlength.dat"));
    int thresh = scan.nextInt();   //Scans the first integer
    String[] array = new String[thresh];   //Creates an empty array with length of the threshold 

    for(int i = 0; i < array.length; i++) {
        array[i] = scan.nextLine();

        /* I need to sort the array from least to
        greatest here so I can use the if statement
        below.
        */

        //Prints the word array from least to greatest by length
        if(array[i].length() == i) {
            System.out.print(i + ": " + array[i]);
        }
    }
}

}

Answer 1

您可以使用自定义比较器对String数组进行排序。例如

        String [] arrr = {"World","Ho","ABCD"};
        Arrays.sort(arrr,new Comparator<String>() {

            @Override
            public int compare(String o1, String o2) {
                return o1.length() - o2.length();
            }
        });
        System.out.println(arrr[0]); \\ Output Ho

Answer 2

重载之一接受Arrays.sort作为第二个参数，您可以在其中实现自己的自定义比较函数，以确定是否应将字符串放在另一个之前或之后，只需实现{{ 3}}方法。

Answer 3

我不用Java编码，但这个伪代码会起作用吗？

Grab the list of words.
Loop through them.
   Get the length of the current word.
   Add that word to that array number:  a 5-letter word would go in array element 5.
Continue the loop until all the words have been added to the proper array.
Display each of the array elements.