Integer.valueOf() 与 Integer.parseInt() [英] Integer.valueOf() vs. Integer.parseInt()

问题描述

除了 Integer.parseInt() 处理减号(如文档所述)之外，Integer.valueOf() 和 Integer.parseInt()?

Aside from Integer.parseInt() handling the minus sign (as documented), are there any other differences between Integer.valueOf() and Integer.parseInt()?

并且由于两者都不能将 , 解析为 decimal 千位分隔符(产生 NumberFormatException)，是否有可用的 Java 方法来做到这一点?

And since neither can parse , as a decimal thousands separator (produces NumberFormatException), is there an already available Java method to do that?

推荐答案

实际上，valueOf 在内部使用了 parseInt.区别在于 parseInt 返回一个 int 原语，而 valueOf 返回一个 Integer 对象.从 Integer.class 来源考虑:

Actually, valueOf uses parseInt internally. The difference is parseInt returns an int primitive while valueOf returns an Integer object. Consider from the Integer.class source:

public static int parseInt(String s) throws NumberFormatException {
    return parseInt(s, 10);
}

public static Integer valueOf(String s, int radix) throws NumberFormatException {
    return Integer.valueOf(parseInt(s, radix));
}

public static Integer valueOf(String s) throws NumberFormatException {
    return Integer.valueOf(parseInt(s, 10));
}

至于用逗号解析，我不熟悉.我会对它们进行消毒.

As for parsing with a comma, I'm not familiar with one. I would sanitize them.

int million = Integer.parseInt("1,000,000".replace(",", ""));

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