有java写一个tp协议

以下是一个简单的Java代码实现TP协议的例子：

import java.io.*;
import java.net.*;

public class TPProtocol {
    private static final int WAITING = 0;
    private static final int SENTKNOCKKNOCK = 1;
    private static final int SENTCLUE = 2;
    private static final int ANOTHER = 3;

    private static final int NUMJOKES = 5;

    private int state = WAITING;
    private int currentJoke = 0;

    private String[] clues = { "Turnip", "Little Old Lady", "Atch", "Who", "Who" };
    private String[] answers = { "Turnip the heat, it's cold in here!", "I didn't know you could yodel!", "Bless you!", "Is there an owl in here?", "Is there an echo in here?" };

    public String processInput(String theInput) {
        String theOutput = null;

        if (state == WAITING) {
            theOutput = "Knock! Knock!";
            state = SENTKNOCKKNOCK;
        } else if (state == SENTKNOCKKNOCK) {
            if (theInput.equalsIgnoreCase("Who's there?")) {
                theOutput = clues[currentJoke];
                state = SENTCLUE;
            } else {
                theOutput = "You're supposed to say \"Who's there?\"! Try again.";
            }
        } else if (state == SENTCLUE) {
            if (theInput.equalsIgnoreCase(clues[currentJoke] + " who?")) {
                theOutput = answers[currentJoke] + " Want another? (y/n)";
                state = ANOTHER;
            } else {
                theOutput = "You're supposed to say \"" + clues[currentJoke] + " who?\"" + "! Try again.";
                state = SENTKNOCKKNOCK;
            }
        } else if (state == ANOTHER) {
            if (theInput.equalsIgnoreCase("y")) {
                theOutput = "Knock! Knock!";
                if (currentJoke == (NUMJOKES - 1)) {
                    currentJoke = 0;
                } else {
                    currentJoke++;
                }
                state = SENTKNOCKKNOCK;
            } else {
                theOutput = "Bye.";
                state = WAITING;
            }
        }
        return theOutput;
    }
}

在这个例子中，我们实现了一个简单的 Knock Knock Joke（顺口溜）的程序，它使用了TP协议进行通信。

主要的逻辑在 `processInput` 方法中，根据当前的状态（WAITING、SENTKNOCKKNOCK、SENTCLUE、ANOTHER），进行相应的交互处理。在每个阶段，我们需要根据用户的输入以及当前状态，构造不同的返回信息，最终完成一个完整的 Knock Knock Joke 的交互过程。

需要注意的是，我们这里并没有实现 TP 协议的完整规范，只是简单地将其应用在这个例子中。在实际的应用中，我们需要更加严谨和完整地实现 TP 协议的所有规范。