Question

我正在尝试创建一个IRC Bot，下面是代码，但是，当它运行时，无论我尝试什么，它都不会检测到“001”，我在JRE6上运行它并使用JDK6。我正在使用Eclipse开发它并使用调试功能来运行它。我试过“java.exe”和“javaw.exe”。在运行时，debugex显示001显然就在那里。

这是我的代码：

package bot;
import java.io.*;
import java.net.*;
public class Main {
    static PrintWriter out = null;
    @SuppressWarnings("unused")
    public static void main(String[] args) {
        Socket sock = null;
        BufferedReader in = null;
        try {
            sock = new Socket("irc.jermc.co.cc",6667);
            in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
            out = new PrintWriter(sock.getOutputStream(), true);
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        boolean sentconnect = false;
        while(sock.isConnected() == true){
            if(sentconnect == false){
                writeout("NICK GBot");
                writeout("USER GBot GBot GBot :GBot");
                sentconnect = true;
            }
            String data = "";
            try {
                data = in.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            data = data.trim();
            if(data != ""){
                System.out.println("[IN] " + data);
            }
            String[] ex;
            ex = data.split(" ");
            for(String debugex : ex){
                //System.out.println("DEBUGEX: " + debugex);
            }
            if(ex[1] == "001"){
                writeout("JOIN #minecraft");
            }
            try {
                Thread.sleep((long) 0.5);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            if(ex[0] == "PING"){
                writeout("PONG " + ex[1]);
            }
        }
    }

    private static void writeout(String msg) {
        out.println(msg);
        System.out.println("[OUT] " + msg);
    }
}

Answer 1

必须使用String.equals()而不是==来测试字符串相等性。

应该是：

        if(! data.isEmpty()){                     // rather than: data != ""
            System.out.println("[IN] " + data);
        }
        ...
        if(ex[1].equals("001")){                  // rather than: ex[1] == "001"
            writeout("JOIN #minecraft");
        }
        ...
        if(ex[0].equals("PING")){                 // rather than: ex[0] == "PING"
            writeout("PONG " + ex[1]);
        }

请参阅How do I compare strings in Java。

数组中的文本未被读取

1 个答案: