java - java中如何替换字符串？

Question

我有一个String str = "a_bcde_fghij_k"。

我想将其更改为“aBcdeFghijK”

如果有_字符，下一个字符将更改为大写并删除_字符。

我该怎么做？

Answer 1

我怀疑您需要逐个字符地浏览这个字符，边构建字符串边进行。例如:

public static String underscoreToCapital(String text) {
    // This will be a bit bigger than necessary, but that shouldn't matter.
    StringBuilder builder = new StringBuilder(text.length());
    boolean capitalizeNext = false;
    for (int i = 0; i < text.length(); i++) {
        char c = text.charAt(i);
        if (c == '_') {
            capitalizeNext = true;
        } else {
            builder.append(capitalizeNext ? Character.toUpperCase(c) : c);
            capitalizeNext = false;
        }
    }
    return builder.toString();
}