将比较器对象存储在数组中 [英] store comparators objects in array

问题描述

我为我的对象定义了4个比较器，如下所示：

I have defined 4 comparators for my object like this:

public static Comparator<mObject> comp0 = new Comparator<mObject>() {

        @Override
        public int compare(mObject l, mObject r) {
            ...compare
        }
    };

public static Comparator<mObject> comp1 = new Comparator<mObject>() {

        @Override
        public int compare(mObject l, mObject r) {
            ...compare
        }
    };

public static Comparator<mObject> comp2 = new Comparator<mObject>() {

        @Override
        public int compare(mObject l, mObject r) {
            ...compare
        }
    };

public static Comparator<mObject> comp4 = new Comparator<mObject>() {

        @Override
        public int compare(mObject l, mObject r) {
            ...compare
        }
    };

现在我想创建一个包含4个比较器的数组，如下所示：

Now i want to create an array with the 4 comparators ,like this :

public final static Comparator<mObject>[] Object_comparators = { comp0,
        comp1,
        comp2,
        comp3};

但是Eclipse强调{..}之间的所有内容，就像它是一个错误。为什么是它，以及如何我可以解决它吗？

but Eclipse underlines everything between {..} like it is an error .Why is it ,and how could i fix it ?

推荐答案

您无法使用参数化泛型类型创建类数组。

You cannot create an array of classes with a parameterized generic type.

如果你不介意失去类型安全，你可以这样做：

If you don't mind losing type safety, you can do this:

Comparator[] list = new Comparator[4];

但我首选的策略是使用 List ：

But my preferred strategy would be to use a List:

List<Comparator<mObject>> list = Arrays.asList(comp0, comp1, comp2, comp3);

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