@Test
public void test(){
int arr[] = {1,2,3,4,5,6,7,8,9};
reverse(arr);
}
//编写一个泛型方法,实现数组反转
public <T> void reverse(T arr[]){
int start = 0;
int end = arr.length-1;
while(start<end){
T temp = arr[start];
arr[start] = arr[end];
arr[end] = temp;
start++;
end--;
}
}
}