如何在 Java 中创建泛型方法？
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How to create a generic method in Java?
提问by TERACytE
I have the following method:
我有以下方法：
public static void update(String name) {
CustomTextType obj = findByName(name);
...
}
I'd like to make it a general use method so that I don't need to write new code for every new custom type. I could do this, which would require instantiating the object before calling update():
我想让它成为一种通用方法，这样我就不需要为每个新的自定义类型编写新代码。我可以这样做，这需要在调用 update() 之前实例化对象：
public static void update(String name, Object obj) {
obj = findByName(name);
...
}
Out of curiosity, I'm wondering if there is a way to do this using Java Generics:
出于好奇，我想知道是否有办法使用 Java 泛型来做到这一点：
// note: this is an example and does not work
public static void update(String name, <T> type) {
type var = findByName(name);
...
}
Is there a way to accomplish this in Java?
有没有办法在 Java 中实现这一点？
采纳答案by nanofarad
public static <T> void update(String name, T type) {
//logic dealing with `T`.
}
Note that Twill be reifiable in this case. Either Foo<T>(which itself includes Class<T>that can be obtained from instanceOfT.getClass()) or Titself has been passed in.
请注意，T在这种情况下，这将是可实现的。要么Foo<T>（它本身包括Class<T>可以从 中获得的instanceOfT.getClass()）或者T它本身已经被传入。
