709. To Lower Case
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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"
class Solution { public String toLowerCase(String str) { int k = (int) (‘a‘); StringBuilder sb = new StringBuilder(); for(char c: str.toCharArray()){ int t = (int) (c); if(!Character.isLetter(c)) sb.append(c); else if(t >= k) sb.append(c); else sb.append((char) (t + 32)); } return sb.toString(); } }
public String toLowerCase(String str) { char[] a = str.toCharArray(); for (int i = 0; i < a.length; i++) if (‘A‘ <= a[i] && a[i] <= ‘Z‘) a[i] = (char) (a[i] - ‘A‘ + ‘a‘); return new String(a); }
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