package?com.company;
import?java.util.Scanner;
public?class?demo03?{
????????/**
?????????*?StringBuffer?是String的增強(qiáng)類谓松，加了緩沖區(qū)星压，效率更高
?????????*?@param?args
?????????*/
????????public?static?void?main(String[]?args)?{
????????????StringBuffer?sb?=new?StringBuffer("生活不止眼前的茍且");
????????????StringBuffer?sb1=sb.append(",");
????????????System.out.println(sb1);//等價(jià)于?System.out.println(sb1.toString());
????????????StringBuffer?sb2?=?sb1.append("還有詩(shī)和遠(yuǎn)方的田野");
????????????System.out.println(sb2);
????????????StringBuffer?sb3?=?sb2.append(false);
????????????System.out.println(sb3);
????????????System.out.println("請(qǐng)輸入一串?dāng)?shù)字:");
????????????Scanner?sc?=?new?Scanner(System.in);
????????????String?s1?=?sc.next();
????????????StringBuffer?sb4?=?new?StringBuffer(s1);
????????????for?(int?i?=?sb4.length()-3;i>0;i=i-3){
????????????????sb4.insert(i,",");
????????????}
????????????System.out.println(sb4);
????????}
????}
