raw use of parameterized class 'result'
时间: 2023-06-05 14:47:59 浏览: 86
参数化类'result'的原始用法是指在定义类时使用泛型参数,以便在实例化类时可以指定具体的类型。这样可以使代码更加灵活和可重用,因为同一个类可以用于处理不同类型的数据。例如,可以定义一个参数化类'result'来表示某个操作的结果,然后在实例化时指定具体的返回值类型。这样可以避免重复编写相似的代码,提高代码的可读性和可维护性。
相关问题
Raw use of parameterized class 'Result'
这是一个编译器的警告信息,意思是你在使用一个带有参数的类时没有指定参数类型,可能会导致一些问题。比如,你定义了一个类Result<T>,但是在使用时没有指定T的具体类型,如Result r = new Result(),这样就会触发这个警告。为了避免这个问题,需要在使用时指定具体的参数类型,比如Result<Integer> r = new Result<Integer>()。这样就可以避免这个警告了。
Raw use of parameterized class
The raw use of a parameterized class refers to using the class without specifying the type parameter. In languages like Java or C#, parameterized classes allow you to create classes that can work with different types. However, if you use the class without specifying the type parameter, it is considered a raw use.
For example, let's say we have a generic class called `Box` that can hold any type of object:
```java
public class Box<T> {
private T value;
public void setValue(T value) {
this.value = value;
}
public T getValue() {
return value;
}
}
```
If we use this class without specifying the type parameter, it becomes a raw use:
```java
Box box = new Box(); // Raw use of Box
box.setValue("Hello"); // No type safety
String value = (String) box.getValue(); // Type casting required
```
In the above example, `Box box = new Box();` is a raw use because we are not specifying the type parameter. This results in the loss of type safety, as we can assign any type of value to the `value` field without any compiler checks. We also need to perform explicit type casting when retrieving the value.
It is generally recommended to avoid raw uses of parameterized classes as they bypass the type safety provided by generics and can lead to runtime errors or unexpected behavior.