question.java

自己写的轮询提问的小程序 新手刚学 多多指教 合乎哈

/*
This is the Question class, according to the client. It is a crippled version of the server's Question
Copyright (C) 2005-2006  Igor Partola, Michael J. Krikonis, Clark University

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

package PollClient;

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

public class Question {
    private String QuestionName;
    private String Question;
    private String AnswerA;
    private String AnswerB;
    private String AnswerC;
    private String AnswerD;
    private String AnswerE;
    private String AnswerF;
    private int Timeout;
    private int NumOfAnswers = 6;
    
    public Question(String qn, String q, String a, String b, String c, String d, String e, String f, int t, int n) {
        QuestionName = qn;
        Question = q;
        
        AnswerA = a;
        AnswerB = b;
        AnswerC = c;
        AnswerD = d;
        AnswerE = e;
        AnswerF = f;
        
        Timeout = t;
        NumOfAnswers = n;
    }
    
    public Question(byte[] bytes) {
        /*
         * question name size = 0..3
         * question size = 4..7
         * answer A size = 8..11
         * answer B size = 12..15
         * answer C size = 16..19
         * answer D size = 20..23
         * answer E size = 24..27
         * answer F size = 28..31
         * timeout = 32..35
         * number of answers = 36..39
         * data = 40....
         */
        
        int qns = bytesToInt(bytes, 0);
        int qs = bytesToInt(bytes, 4);
        int as = bytesToInt(bytes, 8);
        int bs = bytesToInt(bytes, 12);
        int cs = bytesToInt(bytes, 16);
        int ds = bytesToInt(bytes, 20);
        int es = bytesToInt(bytes, 24);
        int fs = bytesToInt(bytes, 28);
        int t = bytesToInt(bytes, 32);
        int n = bytesToInt(bytes, 36);

        String qn = new String(bytes, 40, qns);
        String q = new String(bytes, 40 + qns, qs);
        String a = new String(bytes, 40 + qns + qs, as);
        String b = new String(bytes, 40 + qns + qs + as, bs);
        String c = new String(bytes, 40 + qns + qs + as + bs, cs);
        String d = new String(bytes, 40 + qns + qs + as + bs + cs, ds);
        String e = new String(bytes, 40 + qns + qs + as + bs + cs + ds, es);
        String f = new String(bytes, 40 + qns + qs + as + bs + cs + ds + es, fs);
        
        
        QuestionName = qn;
        Question = q;
        
        AnswerA = a;
        AnswerB = b;
        AnswerC = c;
        AnswerD = d;
        AnswerE = e;
        AnswerF = f;
        Timeout = t;
        NumOfAnswers = n;
        
    }
    
    public String getQuestionName() {
        return QuestionName;
    }

    public String getQuestion() {
        return Question;
    }

    public String getAnswerA() {
        return AnswerA;
    }

    public String getAnswerB() {
        return AnswerB;
    }

    public String getAnswerC() {
        return AnswerC;
    }

    public String getAnswerD() {
        return AnswerD;
    }
    
    public String getAnswerE() {
        return AnswerE;
    }

    public String getAnswerF() {
        return AnswerF;
    }

    public int getTimeout() {
        return Timeout;
    }
 
    public int getNumOfAnswers() {
        return NumOfAnswers;
    }
    
    public String toString() {
        String s;
        
        s = QuestionName + "\n\n" + Question  + "\n\n" + AnswerA + "      " + AnswerC +  '\n' + AnswerB + "      " + AnswerD + '\n';
        
        return s;
    }

    private static int bytesToInt(byte[] b, int offset) {
        int value = 0;
        for (int i = 0; i < 4; i++) {
            int shift = (4 - 1 - i) * 8;
            value += (b[i + offset] & 0x000000FF) << shift;
        }
        return value;
    }

}