你好呀就是这个样子的吗
public class Sandbox4 extends Sandbox2{ public static void main(String[] args) { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String str = null; while(true){ try { str = br.readLine(); }catch(IOException e){ e.printStackTrace(); } if(str.equals("END"))break; System.out.print(str); } } }