java - 如何按长度对字符串进行排序

Question

我遇到了从数组中对字符串进行排序的问题。我能够对整数进行排序，但我真的不知道如何对字符串从最短到最长进行排序。

我尝试使用 Strings.length 将字符串转换为整数，但我不知道如何将它们转换回原始字符串。

字符串处理程序；

        System.out.println("\nNow we will sort String arrays.");
        System.out.println("\nHow many words would you like to be sorted.");
        Input = in.nextInt();
        int Inputa = Input;
        String[] Strings = new String [Input];
        for (int a = 1; a <= Input; Input --) //will run however many times the user inputed it will
    {
        counter ++; //counter counts up
        System.out.println("Number " + counter + ": "); //display 
        userinputString = in.next();
        Strings[countera] = userinputString;  //adds input to array
        countera ++;
    }
        System.out.println("\nThe words you inputed are :");
        System.out.println(Arrays.toString(Strings));

        System.out.println("\nFrom shortest to longest the words are:");
        counter = 0;
        int[] String = new int [Strings.length];
    for (int i = 0; i < Strings.length; i++) //will run however many times the user inputed it will
    { 
       int a = Strings[i].length();
       String[i] = a;
    }

    System.out.println(Arrays.toString(String));

我希望能够对实际的字符串进行排序，但是我得到了数字，并且无法找到如何在排序后将这些数字转回字符串。

Answer 1

如果您被允许使用库函数，那么您可能需要执行以下操作:

Arrays.sort(Strings, Comparator.comparing(String::length));

这适用于 Java 8 及更高版本。只需确保在文件中的某个位置导入 import java.util.*; 即可。