//StringBufferOp.java
//反轉字符串中的字符
public class StringBufferOp
{
    public static void main(String args[])
    {
        String s = "0123456789";
        System.out.println("原來s="+s);
        int i = s.length();
        StringBuffer buffer = new StringBuffer(i);
        for(int j=i-1;j>=0;j--)
        {
            buffer.append(s.charAt(j));
        }
        System.out.println("反轉后s="+buffer);
    }
}