Java程序设计基础教程

				//StringBufferOp.java
				//反转字符串中的字符
				public class StringBufferOp
				{
				    public static void main(String args[])
				    {
				        String s = "0123456789";
				        System.out.println("原来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("反转后s="+buffer);
				    }
				}