覆盖Java中没有子类化的方法 [英] overriding methods without subclassing in Java

问题描述

我最近开始了一个新项目，第一次看到了如下所示的覆盖使用。

I started on a new project recently and saw the usage of overriding like below for the first time.

public class SomeClass {
  public void myMethod() {
    XStream xstream = new XStream() {
            @Override
            protected MapperWrapper wrapMapper(MapperWrapper next) {
                return new MapperWrapper(next) {
 // the rest ommitted

基本上，它覆盖了wrapMapper（）方法在Thoughtworks xstream api中的XStream类，但没有SomeClass来扩展XStream类。我和Java一起工作了很多年，但这是我第一次看到这样的压倒一切。有人可以解释它的内外情况吗？谢谢。

Basically, it's overriding the wrapMapper() method of the XStream class in the thoughtworks xstream api but without having SomeClass to extend the XStream class. I've worked with Java for a number of years but this is the first time I saw overriding being done like this. Can someone explain the ins and out of it? Thanks.

推荐答案

这是匿名内部类。

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