<div id="readability-page-1" class="page"><div><blockquote>
내 풀이
</blockquote>
<img src="https://velog.velcdn.com/images/psj0810/post/6c0f9e2c-bf8c-43f6-b0b5-7023e4a0943f/image.png">
<pre><code>class Solution {
 public String solution(String str1, String str2) {
 String answer = "";

 char[] chaArr1 = str1.toCharArray();
 char[] chaArr2 = str2.toCharArray();

 for(int i = 0; i&lt;chaArr1.length; i++){
 answer = answer + chaArr1[i]+chaArr2[i];
 }

 System.out.println("answer = "+answer);

 return answer;
 }
}</code></pre>
<blockquote>
다른 사람 풀이
</blockquote>
<pre><code>class Solution {
 public String solution(String str1, String str2) {
 String answer = "";

 for(int i = 0; i &lt; str1.length(); i++){
 answer+= str1.charAt(i);
 answer+= str2.charAt(i);
 }

 return answer;
 }
}</code></pre>
<blockquote>
풀이 
charAt 활용
</blockquote>

<blockquote>
다른 사람 풀이
</blockquote>
<pre><code>class Solution {
 public String solution(String str1, String str2) {
 char[] chars1 = str1.toCharArray();
 char[] chars2 = str2.toCharArray();

 StringBuilder sb = new StringBuilder();
 for (int i=0; i&lt;chars1.length; i++) {
 sb.append(chars1[i]).append(chars2[i]);
 }

 return sb.toString();
 }
}
</code></pre>
<blockquote>
풀이 
mutable 객체인 StringBuilder 활용하여 메모리 사용량을 줄임
</blockquote></div></div>

psj.log

내 풀이
class Solution {
 public String solution(String str1, String str2) {
 String answer = "";
 char[] chaArr1 = str1.toCharArray();
 char[] chaArr2 = str2.toCharArray();
 for(int i = 0; i<chaArr1.length; i++){
 answer = answer + chaArr1[i]+chaArr2[i];
 }
 System.out.println("answer = "+answer);
 return answer;
 }
}
다른 사람 풀이
class Solution {
 public String solution(String str1, String str2) {
 String answer = "";
 for(int i = 0; i < str1.length(); i++){
 answer+= str1.charAt(i);
 answer+= str2.charAt(i);
 }
 return answer;
 }
}
풀이 
charAt 활용
다른 사람 풀이
class Solution {
 public String solution(String str1, String str2) {
 char[] chars1 = str1.toCharArray();
 char[] chars2 = str2.toCharArray();
 StringBuilder sb = new StringBuilder();
 for (int i=0; i<chars1.length; i++) {
 sb.append(chars1[i]).append(chars2[i]);
 }
 return sb.toString();
 }
}
풀이
mutable 객체인 StringBuilder 활용하여 메모리 사용량을 줄임

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