最近对这两个问题比较懵逼,关于List和ArrayList.List<String> list = new ArrayList<String>(); 好了,先搞明白List 和 ArrayList吧. List是一个接口,是Collection接口的一个子接口,是一个有序的集合. ArrayList是List的一个实现类,可以实现数组大小的可变,可以很方便的进行增加和删减数组内元素的操作. List<NameValuePair> paraList = new Array
public class DigitalTrans { /** * 数字字符串转ASCII码字符串 * * @param String * 字符串 * @return ASCII字符串 */ public static String StringToAsciiString(String content) { String result = ""; int max = content.length(); for (int i = 0; i < max; i++) { char c
Given a string and an integer k, you need to reverse the first k characters for every 2k characters counting from the start of the string. If there are less than k characters left, reverse all of them. If there are less than 2k but greater than or eq
Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order. Example 1: Input: "Let's take LeetCode contest" Output: "s'teL ekat edoCteeL tsetnoc"