什么是未经检查和不安全的操作？ [英] What is unchecked and unsafe operation here?

问题描述

我有以下代码：

private static final Set<String> allowedParameters;
static {
    Set<String> tmpSet = new HashSet();
    tmpSet.add("aaa");
    allowedParameters = Collections.unmodifiableSet(tmpSet);
}

因此：

Note: mygame/Game.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

当我重新编译建议的选项时，我看到一个指针前面 HashSet（）; 。

And when I recompile with the suggested option I see a pointer (^) pointing at "new" in front of HashSet();.

有人知道这是怎么回事吗？

Does anybody know what is going on here?

推荐答案

是的，你正在创建一个新的HashSet，而不说明它应该包含什么类，然后断言它包含字符串。将其更改为

Yes, you're creating a new HashSet without stating what class it should contain, and then asserting that it contains strings. Change it to

 Set<String> tmpSet = new HashSet<String>();

这篇关于什么是未经检查和不安全的操作？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！