Java 代码优化：StringBuilder 构建字符串并添加换行符

优化代码内容： StringBuilder sb = new StringBuilder(); for (int i = 0; i < sortedStrings.size() - 1; i++) { sb.append(sortedStrings.get(i)).append(' '); } if (sortedStrings.size() > 0) { sb.append(sortedStrings.get(sortedStrings.size() - 1)); } String result = sb.toString();