java自定义泛型

import org.junit.Test;

public class ArrReserve {
    @Test
    public void test() {
        // String[] arr = {"1","2","3","4","5","6"};
        Integer[] arr = { 1, 2, 3 };//如果把Integer改成int，会编译失败，因为自定义泛型不能是基本数据类型？！
        reserve(arr);
    }

    public <T> void reserve(T arr[]) {
        int start = 0;
        int end = arr.length - 1;

        while (start < end) {
            T t = arr[start];
            arr[start] = arr[end];
            arr[end] = t;
            start++;
            end--;
        }
        for (T temp : arr) {
            System.out.println(temp);

        }
    }

}