经常要判断传入的参数是否为空,或者对数组、集合进行一些操作:排序、反转
import org.apache.commons.lang3.ArrayUtils;
判断数组/集合为空
https://www.cnblogs.com/onedir/p/4842828.html
import java.util.Arrays;
https://blog.csdn.net/xuehyunyu/article/details/76695576
public void invertUsingCollectionsReverse(Object[] array) { List<Object> list = Arrays.asList(array); Collections.reverse(list); }
https://blog.csdn.net/neweastsun/article/details/79935638