下面程序的输出结果是: Enter a character:a a 空白处应当填 ( ) 。 Import java.io.* ; classBRRead{ public static void main(String[]args)throws IOException{ char c; BufferedReaderbr = new BufferedReader(new InputStreamReader(System.in)); System.out.print(“Enter a character:”); _____________________ System.out.println(c); } }