的Java函數作爲對象

Question

我有一個很好的使用了具有下述功能的Java對象，又名以下之類的事情：

Function handle_packet_01 = void handle() {} 

我不希望使用Scala的，因爲我不能忍受句法。

是否有任何破解我可以適用於JVM允許我這樣做？怎麼樣一個Eclipse插件？

我在Java中看到了一個類似於運算符重載的東西，我也將安裝該插件。

Answer 1

在Java 8可以引用一個構件的方法如下

MyClass::function 

編輯：一個更完整的示例

//For this example I am creating an interface that will serve as predicate on my method 
public interface IFilter 
{ 
    int[] apply(int[] data); 
} 

//Methods that follow the same rule for return type and parameter type from IFilter may be referenced as IFilter 
public class FilterCollection 
{ 
    public static int[] median(int[]) {...} 
    public int[] mean(int[]) {...} 
    public void test() {...} 
} 

//The class that we are working on and has the method that uses an IFilter-like method as reference 
public class Sample 
{ 
    public static void main(String[] args) 
    { 
     FilterCollection f = new FilterCollection(); 
     int[] data = new int[]{1, 2, 3, 4, 5, 6, 7}; 

     //Static method reference or object method reference 
     data = filterByMethod(data, FilterCollection::median); 
     data = filterByMethod(data, f::mean); 

     //This one won't work as IFilter type 
     //data = filterByMethod(data, f::test); 
    } 

    public static int[] filterByMethod(int[] data, IFilter filter) 
    { 
     return filter.apply(data); 
    } 

} 

此外看一看lambda expressions爲另一實例和方法的使用參考