title
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"
solution
大写变小写
class Solution {
public String toLowerCase(String str) {
char[] t=str.toCharArray();
for (int i = 0; i < t.length; i++) {
t[i]=Character.toLowerCase(t[i]);
}
return String.valueOf(t);
}
}