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軟件設計師案例分析每日一練試題內容(2023/3/26)
閱讀下列說明和Java代碼,將應填入(n)處的字句寫在題紙的對應欄內。
【說明】
享元(flyweight)模式主要用于減少創(chuàng)建對象的數(shù)量,以低內存占用,提高性能?,F(xiàn)要開發(fā)一個網絡圍棋程序允許多個玩家聯(lián)機下棋。由于只有一臺服務器,為節(jié)內存空間,采用享元模式實現(xiàn)該程序,得到如圖6-1所的類圖。
【Java代碼】
import java.util.*:
enum PieceColor {BLACK,WHITE}//棋子顏色
class PiecePos{//棋子位置
private intx;
private int y:
pubic PiecePos(int a,int b){x=a;y=b;}
public int getX0{retun x;}
public int getYO{return y;}
}
abstract class Piece{//棋子定義
protected PieceColor m_color;//顏色
protected Piecemopos m_pos;//位置
public Piece(PieceColor,color PiecePos
pos){m color=color;
{:sod=sod u
(1);
}
class BlackPiece extends Piece{
public BlackPiece(PieceColor
color,PiecePos pos){super(color,pos);}
public void drawO{
System out println("draw a black
piece");}
}
class WhitePiece extends Piece{
public WhitePiece(PieceColor
color,PiecePos pos){super(c
olor,pos):}
public void draw0{
System.out.println("draw a white
piece");
}
{
class PieceBoard{
//棋盤上已有的棋子
private static final
ArrayList<(2)>m_arrayPiece=new Arra
yList
private String m_blackName;//黑方名稱
private String m_whiteName;//白方名稱
public PieceBoard(String black,String
white){
m_blackName=black;m_whiteName=white;
}
//一步棋,在棋盤上放一顆棋子
public void SetePiece(PieceColor
color,PiecePos pos){
(3)piece=null;
if(color==PieceColor.BLACK)(//放黑子
piece=new BlackPiece(color,pos);//獲取一顆黑子
System.out.println(m_blackName+"在位置("+pos.getX0)
+","+pos.getYO+")");
(4):
{
else{//放白子
piece=new WhitePiece(color,pos);//獲取一顆白子
System.out.println(m whiteName+"在位置("+pos.getX0)+
","+pos.getYO+")");
(5):
}
m_arrayPiece.add(piece);
}
}
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信管網考友試題答案分享:
信管網garry范:
1.abstract void draw()
2.piece
3.piece
4.piece.draw()
5.piece.draw()
信管網cnitpm538497719640:
1.public abstract void draw();
2.piece
3.piece
4.piece.draw()
5.piece.draw()
信管網cnitpm540495893277:
(1)void draw()
(2)piece
(3)piece
(4)piece.draw();
(5)piece.draw();
信管網試題答案與解析:
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