java - 如何转换 : cut(Orange. 类)-> 剪切(橙色)

Question

如何变换:cut(Orange.class) -> cut(Orange)

剪切函数如下所示:

protected <T extends Fruit> T cut(Class<T> fruitClass){
    try {
        return fruitClass.newInstance();
    } catch (InstantiationException | IllegalAccessException e) {

    }
}

Answer 1

您可以从传递的实例中获取类型:

protected <T extends Fruit> T cut(T fruit) {
    try {
        return (T)fruit.getClass().newInstance();
    } catch (InstantiationException | IllegalAccessException e) {
        // throw some exception or return an alternative instance or null
    }
}