java - 字符串解释为 boolean 值

Question

这是我的代码:

try {
    BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
    String temp = reader.readLine();
    if(temp!=null)
        result = new JSONObject(temp);
} catch (Exception e) {
    e.printStackTrace();
}

如您所见，我将 String 分配给 String 类型对象，但是当代码运行时，result="true" 并且出现异常:

Value true of type java.lang.Boolean cannot be converted to JSONObject

这令人沮丧..我应该对 String 对象进行强制转换还是使用 .toString() 吗？为什么它会自动转换为 boolean 值？

更新我发现这不是 Java 问题，而是 JSONObject 构造函数未接收有效的 JSONObject。

Answer 1

您所观察到的情况是预期的。引用自JSONObject :

Strings do not need to be quoted at all if they do not begin with a quote or single quote, and if they do not contain leading or trailing spaces, and if they do not contain any of these characters: { } [ ] /
\ : , = ; # and if they do not look like numbers and if they are not the reserved words true, false, or null.