狐狸和兔子代码-Java

package foxnRabbit; import java.util.ArrayList; import javax.swing.JFrame; import animal.Animal; import animal.Fox; import animal.Rabbit; import cell.Cell; import field.Field; import field.Location; import field.View; public class FoxAndRabbit { private Field theField; private View theView; public FoxAndRabbit(int size) { theField = new Field(size, size); for ( int row = 0; row<theField.getHeight(); row++ ) { for ( int col = 0; col<theField.getWidth(); col++ ) { double probability = Math.random(); if ( probability < 0.05 ) { theField.place(row, col, new Fox()); } else if ( probability < 0.15 ) { theField.place(row, col, new Rabbit()); } } } theView = new View(theField); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setResizable(false); frame.setTitle("Cells"); frame.add(theView); frame.pack(); frame.setVisible(true); } public void start(int steps) { for ( int i=0; i<steps; i++ ) { step(); theView.repaint(); try { Thread.sleep(200); } catch (InterruptedException e) { e.printStackTrace(); } } } public void step() { for ( int row = 0; row< theField.getHeight(); row++ ) { for ( int col = 0; col < theField.getWidth(); col++ ) { Cell cell = theField.get(row, col); if ( cell != null ) { Animal animal = (Animal)cell; animal.grow(); if ( animal.isAlive() ) { // move Location loc = animal.move(theField.getFreeNeighbour(row, col)); if ( loc != null ) { theField.move(row, col, loc); } // eat // animal.eat(theField); Cell[] neighbour = theField.getNeighbour(row, col); ArrayList<Animal> listRabbit = new ArrayList<Animal>(); for ( Cell an : neighbour ) { if ( an instanceof Rabbit ) { listRabbit.add((Rabbit)an); } } if ( !listRabbit.isEmpty() ) { Animal fed = animal.feed(listRabbit); if ( fed != null ) { theField.remove((Cell)fed); } } // breed Animal baby = animal.breed(); if ( baby != null ) { theField.placeRandomAdj(row, col, (Cell)baby); } } else { theField.remove(row, col); } } } } } public static void main(String[] args) { FoxAndRabbit fnr = new FoxAndRabbit(50); fnr.start(100); } }