题目:
Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase.
Example 1:
Input: "Hello" Output: "hello"
Example 2:
Input: "here" Output: "here"
Example 3:
Input: "LOVELY" Output: "lovely"
代码:
class Solution {
public String toLowerCase(String str) {
return str.toLowerCase();
}
}