java 将 Object 转换为原始 int
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Convert Object into primitive int
提问by alan
How to Convert an Object(not String),like TreeNode.item, into primitive like int.
如何将一个对象（不是字符串），比如 TreeNode.item，转换成像 int 这样的原始类型。
回答by Andreas Dolk
In response to your last comment: just double-check, that the object is really of type Integer, then use auto-boxing (I assume that your compiler level is 1.5+):
回应您的最后一条评论：只需仔细检查，该对象确实是 Integer 类型，然后使用自动装箱（我假设您的编译器级别为 1.5+）：
Object o = getTheValue();
int result = 0; // we have to initialize it here!
if (o instanceof Integer) {
result = (Integer) o;
} else {
throw new WTFThisShouldHaveBeenIntegerException();
}
回答by Daniel Earwicker
hashCode()might be what you want. Then again, it might not.
hashCode()可能是你想要的。再说一次，它可能不会。
