package dynamic;import java.io.DataInputStream;import java.io.InputStream;import java.util.Scanner;/** * Created by yuan on 2017/2/16. */public class testStrem { public static void main(String[] args) { StringBuilder out = new StringBuilder(); out.append("a"); out.append("b"); out.append("b"); out.append("b"); out.append("b"); System.out.PRintln(out.toString()); }}
