Merge Strings Alternately
给两个string, 返回一个string, 要求交替字符.
class Solution {
public String mergeAlternately(String word1, String word2) {
int n = word1.length();
int m = word2.length();
StringBuilder sb = new StringBuilder();
int i = 0;
for(; i < Math.min(n, m); i++){
sb.append(word1.charAt(i));
sb.append(word2.charAt(i));
}
while(i < n) {
sb.append(word1.charAt(i++));
}
while(i < m) {
sb.append(word2.charAt(i++));
}
return sb.toString();
}
}