数组Java中每个元素的长度 [英] length of each element in an array Java

问题描述

这是我正在尝试使用的内容。方法.length对我尝试的任何东西都不起作用，所以我甚至不知道从哪里开始。

Here is what I'm trying to use. The method .length doesn't work for anything I try, so I'm not even sure where to begin.

import java.util.ArrayList;

public class LengthsOfStrings {
public static ArrayList<Integer> lengths(ArrayList<String> list) {
    ArrayList<Integer> lengthList = new ArrayList<Integer>();
    for (int nums: lengthList) {
        System.out.println(nums.length());  
    }


    return lengthList;
}

public static void main(String[] args) {
    ArrayList<String> list = new ArrayList<String>();
    list.add("Ciao");
    list.add("Moi");
    list.add("Benvenuto!");
    list.add("badger badger badger badger");
    ArrayList<Integer> lengths = lengths(list);

    System.out.println("The lengths of the Strings: " + lengths);
}
}

推荐答案

你正在尝试迭代单个 int 而不是字符串数组。更改

You are trying to iterate through a single int instead of the strings array. Change

for (int nums: lengthList) {
    System.out.println(nums.length());  
}

到

for (String str: list) { // loop through the list of strings
    lengthList.add(str.length()); // store the individual length of each string
}

以便遍历列表字符串，收集每个字符串&的长度将它存储在 Arraylist 中，以后返回。

so as to loop through the list of strings, collect the length of each string & store it int the Arraylist that you return later.

这篇关于数组Java中每个元素的长度的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！