华为OJ——字符串最后一个单词的长度

题目：

计算字符串最后一个单词的长度，单词以空格隔开。

The java.util.Scanner.hasNext():This method Returns true if this scanner has another token in its input. This method may block while waiting for input to scan. The scanner does not advance past any input

StringcharAt() Method:This method returns the character located at the String's specified index. The indexes start from zero.

java.util.Scanner.Next():This method returns a String object which is a complete token of the Scanner object.

返回Scanner的下一个标记，或指定模式的下一个匹配，即返回的只是第一个输入

向前跳过当前行，并返回输入中跳过的输入行,即返回的是一行

Example:

public class Test {   public static void main(String args[]) {      String s = "Strings are immutable";      char result = s.charAt(8);      System.out.PRintln(result);   }}Result:
a