java - while 循环内来自 stringbuilder 的 StringIndexOutOfBoundsException 错误

Question

例如，分配是从字符串“I am Sam am I Sam”中删除字符“a”，这是我有的一段代码远:

public String removeLetters() {
    String cleaned=sentence;
    StringBuilder builder = new StringBuilder(cleaned);

    while(cleaned.indexOf(lookFor) != -1) {
        builder.deleteCharAt(cleaned.indexOf(lookFor));
    }
    return builder.toString();
}

当没有 while 循环时，此方法返回正常(尽管它只删除一个字符)，但是当我使用 while 循环运行它时，我收到 OutOfBounds 错误。

Answer 1

更改此:

while(cleaned.indexOf(lookFor) != -1) {
    builder.deleteCharAt(cleaned.indexOf(lookFor));
}

这样:

while(builder.indexOf(Character.toString(lookFor)) != -1) {
    builder.deleteCharAt(builder.indexOf(Character.toString(lookFor)));
}