reversethread.java

java应用开发详解

import java.io.*;

public class ReverseThread extends Thread 
{
    private PrintWriter out = null;
    private BufferedReader in = null;

    //需要一个输入流和输出流做参数
    public ReverseThread(PrintWriter out, BufferedReader in) 
    {
        this.out = out;
        this.in = in;
    }

    public void run() 
    {
        if (out != null && in != null) 
        {
            try {
                String input;
                //将输入流的内容写入输出流
                while ((input = in.readLine()) != null) 
                {
                    out.println(reverseIt(input));
                    out.flush();
                }
                out.close();
            } 
            catch (IOException e) 
            {
                System.err.println("ReverseThread run: " + e);
            }
        }
    }
 
    //逻辑的实现
    private String reverseIt(String source) 
    {
        int i, len = source.length();
        StringBuffer dest = new StringBuffer(len);

	//倒序排列字串
        for (i = (len - 1); i >= 0; i--)
            dest.append(source.charAt(i));
        return dest.toString();
    }
}