Java - 通过参数传递方法(Java - Passing a method through a parameter)

 我正在尝试创建一种方法，允许我使用我认为称为lambdas的方法，在一系列连接上执行方法。 
 
 这是我在经过一些研究后得出的代码，但它不起作用： 
 
performGlobalAction(()->{
    // doSomething();
});
 
 你还需要看到我假设的方法： 
 
private <T> void performGlobalAction(Callable<T> action) {
    for(int i = 0; i < connectionList.size(); i++) {
        connectionList.get(i).performAction(action);
    }
}
 
 这提供了以下错误： 
 
The method performAction(Callable<T>) in the type Connection is not
applicable for the arguments (() -> {})
 
 这种方法的目标是允许自己构建一个“在旅途中”的方法而不为它创建空白。 
 
 这可能吗？ 看起来我之前已经使用了大量的声明。 看起来这实际上就是lambdas语句的工作原理。 

I'm trying to create a method that allows me to make use of what I believe is called lambdas, to execute a method over a series of connections.
 
Here's my code that I've come up with after some research, but it doesn't work:
 
performGlobalAction(()->{
    // doSomething();
});
 
You'll also need to see the method I would assume:
 
private <T> void performGlobalAction(Callable<T> action) {
    for(int i = 0; i < connectionList.size(); i++) {
        connectionList.get(i).performAction(action);
    }
}
 
This provides the following error:
 
The method performAction(Callable<T>) in the type Connection is not
applicable for the arguments (() -> {})
 
The goal of this method is to allow myself to construct a method "on the go" without creating a void for it.
 
Is this possible? It seems like I've used plenty of statements that have done this before. It seems like this is actually exactly how lambdas statements work.

原文：https://stackoverflow.com/questions/26985390