//----------------------以下待删除-------------- // TODO 学习后删除; public static String getTestString() { StringBuilder sb = new StringBuilder();//新建一个SB sb.append("Print: "); for(int i=0; i < 10; i++) { if(i != 0) { sb.append(", "); // s += ", "; //BAD! } sb.append(i); // s += i; //BAD! } sb.append("a").append("b").append("C"). append("w"); return sb.toString(); System.out.println(sb.toString()); // return s; // BAD! // return "Id: " + id; // 简单情况下使用"+"链接, OK }
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