在java中获取字符串数组中单个String的大小?

时间:2014-07-24 12:10:18

标签: java arrays string

我有一个字符串数组,我想获得字符串数组中特定元素中的字符数,我该怎么做? 像数组arr has = {“abc”,“bgfgh”,“gtddsffg”} 如果我使用

则为a.length;我将得到3是数组中的no.of元素

但我想要一种方法,当我在每个元素上应用时,如

    for(int = 0;   ; i++)
    {
        int t = a[i].length; //this method doesn't work
    }     

返回每个元素中的字符数 给定的例子必须是3,5和8

请回复?

4 个答案:

答案 0 :(得分:3)

package stackoverflow.q_24933319;

public class FindLength {
    public static void main(String[] args) {
        String[] arr = {"abc","bgfgh","gtddsffg"};
        System.out.println("Array size is: " + arr.length);
        for(String s : arr) {
            System.out.println("Value is " + s + ", length is " + s.length());
        }
    }
}

//Output:
//Array size is: 3
//Value is abc, length is 3
//Value is bgfgh, length is 5
//Value is gtddsffg, length is 8

答案 1 :(得分:2)

与数组不同,String没有属性length,但它有一个方法length(),它返回String的长度(以Unicode代码为单位,请参阅JavaDoc )。

试试这个:a[i].length()

答案 2 :(得分:1)

我认为一个好主意是将字符数放入另一个表中。如果你愿意,你可以在for循环之外的每个数字上做一些其他的操作。

String [] input = {"aaaa", "sdasdwdas", "sd"}; int [] output = new int [input.length]; for (int i = 0; i < input.length; i++) output[i] = input[i].length();

答案 3 :(得分:0)

我认为这段代码至少在其中一个功能中可以回答你的问题。

public int[] getEachLengthIndividually(String[] arr)
{
    int[] retArray = new int[arr.length];
    for(int i = 0; i < arr.length; i++)
    {
        String string = arr[i];
        retArray[i] = string.length();
    }
    return retArray;
}

public int totalSize(String[] arr)
{
    int totalSize = 0;
    for(String string : arr)
    {
        totalSize += string.length();
    }
    return totalSize;
}

public static void main(String[] args)
{
     String[] arr = {"abc", "bgfgh", "gtddsffg"};
     int[] eachLengthIndividually = getEachLengthIndividually(arr);
     int totalLength = getTotalLength(arr);
     for(int i = 0; i < eachLengthIndividually.length; i++)
     {
         System.out.println("The string " + arr[i] + " at index " + i + " has length of " + eachLengthIndividually[i]);
     }
     System.out.println("The total length of all strings in the array is " + totalLength);
}