System.out.println('R'+0);
StringBuffer s = new StringBuffer('R');//初始容量为82的StringBuffer,with no characters
s.append("abcde");
System.out.println(s);//输出为abcde
StringBuffer s = new StringBuffer('R');//初始容量为82的StringBuffer,with no characters
s.append("abcde");
System.out.println(s);//输出为abcde