将每 N 个字符的 char 放入一个 java 字符串中

Putting char into a java string for each N characters(将每 N 个字符的 char 放入一个 java 字符串中)

问题描述

我有一个可变长度的 java 字符串.

I have a java string, which has a variable length.

我需要将 "<br>" 部分放入字符串中，例如每 10 个字符.

I need to put the piece "<br>" into the string, say each 10 characters.

例如这是我的字符串:

`this is my string which I need to modify...I love stackoverlow:)`

我怎样才能得到这个字符串?:

How can I obtain this string?:

`this is my<br> string wh<br>ich I nee<br>d to modif<br>y...I love<br> stackover<br>flow:)`

谢谢

推荐答案

类似:

public static String insertPeriodically(
    String text, String insert, int period)
{
    StringBuilder builder = new StringBuilder(
         text.length() + insert.length() * (text.length()/period)+1);

    int index = 0;
    String prefix = "";
    while (index < text.length())
    {
        // Don't put the insert in the very first iteration.
        // This is easier than appending it *after* each substring
        builder.append(prefix);
        prefix = insert;
        builder.append(text.substring(index, 
            Math.min(index + period, text.length())));
        index += period;
    }
    return builder.toString();
}

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