1768.交替合并字符串
https://leetcode.cn/problems/merge-strings-alternately/description/?envType=study-plan-v2&envId=leetcode-75
public String mergeAlternately(String word1, String word2) {
int len1 = word1.length();
int len2 = word2.length();
StringBuilder stringBuilder = new StringBuilder();
int i = 0, j = 0;
while (i < len1 && j < len2){
stringBuilder.append(word1.charAt(i)).append(word2.charAt(j));
i++;
j++;
}
if (i == len1 && j == len2) return stringBuilder.toString();
if (i == len1){
stringBuilder.append(word2.substring(j,len2));
}else {
stringBuilder.append(word1.substring(i,len1));
}
return stringBuilder.toString();
}
总结:这种构造新字符串的使用StringBuilder类很方便 ,String类的substring方法是左闭右开的方法。
标签:String,LeetCode75,stringBuilder,len1,1768,word1,word2,字符串,append From: https://www.cnblogs.com/jeasonGo/p/18056282