public classHistory {

    privateString[]recorders= {"太史伯","太史仲","太史叔","太史季","南史氏"};
    private intrecord_num=0;//被崔杼殺害的史官數量
    privateStringtruth="崔杼弒其君";

    publicHistory(intrecord_num) {
        this.record_num= record_num;
    }

    /**
     * 發生
     */
    public voidhappen(){
        Log.e("歷史事件發生",truth);
    }

    /**
     * 記錄
     */
    publicMemoto record(){
        Log.e(recorders[record_num] +"書曰",truth);
        Memoto memoto =newMemoto(truth);
        returnmemoto;
    }

    /**
     * 史官遇害
     */
    public voidkillRecorder(){
        truth="暴病而死";
        Log.e("崔杼殺害"+recorders[record_num] +",妄圖篡改歷史",truth);
    }

    /**
     * 前赴后繼
     */
    public voidrecordAgain(Memoto memoto){
        this.truth= memoto.getTruth();
        Log.e(recorders[record_num] +"嗣書",truth);
    }

}

public classMemoto {

    privateStringtruth;

    publicMemoto(String truth) {
        this.truth= truth;
    }

    publicString getTruth() {
        returntruth;
    }
}

public classCaretaker {

    Memotomemoto;

    public voidarchive(Memoto memoto){
        this.memoto= memoto;
    }

    public  Memoto getMemoto(){
        returnmemoto;
    }

}

History history_0 =newHistory(0);
history_0.happen();

Caretaker caretaker =newCaretaker();

caretaker.archive(history_0.record());
history_0.killRecorder();

History history_1 =newHistory(1);
history_1.recordAgain(caretaker.getMemoto());
history_1.killRecorder();

History history_2 =newHistory(2);
history_2.recordAgain(caretaker.getMemoto());
history_2.killRecorder();

History history_3 =newHistory(3);
history_3.recordAgain(caretaker.getMemoto());