java - Eclipse for Java 中的 "unavoidable generic type problems"是什么？

Question

在“错误/警告”面板中设置 Java 编译器的首选项时，Eclipse 可以配置为“忽略不可避免的泛型类型问题”。

Java 中这种“不可避免”的泛型类型问题是什么？忽略这些安全吗？它们什么时候出现？

Answer 1

来自 the documentation特征:

When enabled, the compiler will issue an error or a warning even when it detects a generic type problem that could not have been avoided by the programmer. As an example, a type may be forced to use raw types in its method signatures and return types because the methods it overrides from a super type are declared to use raw types in the first place.

所以，例如:

class Test {
    public void method(ArrayList list) {
    }
}

class TestSub extends Test {

    @Override
    public void method(ArrayList list) {
    //                 ^^^^^^^^^
    //     Complain on use of raw type or not?

        System.out.println("Overridden");
    }
}