現在把FoxAndRabbit給碼出來：

package?foxnrabbit;

import?java.util.ArrayList;

import?java.util.List;

import?javax.swing.JFrame;

import?ICell.ICell;

import?animal.Animal;

import?animal.Fox;

import?animal.Rabbit;

import?field.Field;

import?field.Location;

import?field.View;

public?class?FoxAndRabbit?{

private?Field?field;

private?View?view;

public?FoxAndRabbit(int?size)?{

field?=?new?Field(size,?size);

for(int?row?=?0;?row?

for(int?col?=?0;?col?

double?probability?=?Math.random();

if(probability?

field.place(row,?col,?new?Fox());

}else?if(probability?

field.place(row,?col,?new?Rabbit());

}

}

}

view?=?new?View(field);

JFrame?frame?=?new?JFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setResizable(false);

frame.setTitle("FoxAndRabbit");

frame.add(view);

frame.pack();

frame.setVisible(true);

}

public?void?start(int?steps)?{

for(int?i?=?0;?i?

step();

view.repaint();

try?{

Thread.sleep(200);

}?catch?(Exception?e)?{

e.printStackTrace();

}

}

}

public?void?step()?{

for(int?row?=?0;?row?

for(int?col?=?0;?col?

ICell?cell?=?field.get(row,?col);

if(cell?!=?null)?{

Animal?animal?=?(Animal)?cell;

animal.grow();

System.out.println(animal);

if(animal.isAlive()){

//move

Location[]?freeAdj?=?field.getFreeAdj(row,?col);

if(freeAdj.length?>?0)?{

Location?moveloc?=?animal.move(row,?col,?freeAdj);

if(moveloc?!=?null)?{

field.move(row,?col,?moveloc);

}

}

//feed，注意，吃掉的animal一定要remove出來；

ICell[]?neighbour?=?field.getNeighbour(row,?col);

List?listofRabbit?=?new?ArrayList();

if(neighbour.length?>?0)?{

for(ICell?c?:?neighbour)?{

if(c?instanceof?Rabbit)?{

listofRabbit.add((Rabbit)?c);

}

}

if(!listofRabbit.isEmpty()){

Animal?fed?=?animal.feed(row,?col,?listofRabbit);

if(fed?!=?null)?{

field.remove((ICell)?fed);

}

}

}

//breed

Animal?baby?=?animal.breed();

if(baby?!=?null)?{

field.placeRandomAdj(row,?col,?(ICell)baby);

}

}else?{

field.remove(row,?col);

}

}

}

}

}

public?static?void?main(String[]?args)?{

FoxAndRabbit?fnr?=?new?FoxAndRabbit(40);

fnr.start(150);

}

}

總結

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