编辑代码

import java.io.*;

public class BRtest{
    public static void main(String arg[])throws IOException{ 
        
        char c ;
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        do{
            c = (char) br.read();
            System.out.println(c);
        }while(c != 'q');
    }
}