跳蚤移动

package unit3;

import com.sun.org.apache.xpath.internal.axes.WalkerFactory;

public class House {
    private int m;
    private int n;
    private int[][]a;
    public  House() {
        m=10;
        n=10;
        a=new int[m][n];
        for(int i=0;i<m;i++){
            for(int j=0;j<n;j++){
                a[i][j]=0;
            }
        }
    }
    public House(int m,int n) {
        this.m=m;
        this.n=n;
        a=new int[m][n];
        for(int i=0;i<m;i++){
            for(int j=0;j<n;j++){
                a[i][j]=0;
            }
        }
    }
    public int getM() {
        return m;
    }
    public int getN() {
        return n;
    }
    public int[][] getA() {
        return a;
    }
    public int getElement(int i,int j) {
        return a[i][j];
    }
    public void setElement(int i,int j,int value) {
        a[i][j]=value;
    }
    public boolean checkZero() {
        for(int i=0;i<m;i++){
            for(int j=0;j<n;j++){
                if(a[i][j]==0) return true;
            }
        }
        return false;
    }
    public void  display() {
        for(int i=0;i<m;i++){
            for(int j=0;j<n;j++){
                System.out.print(" "+a[i][j]+" ");
            }
            System.out.println();
        }
    }
    public class Tiaozao{
        private static final int UP=0;
        private static final int DOWN=1;
        private static final int RIGHT=2;
        private static final int LEFT=3;
        private int x,y;
        private int totals=0;
        private House ahouse;
        public Tiaozao(House h){
            ahouse=h;
            totals=0;
            x=(int)(Math.random()*ahouse.getM());
            y=(int)(Math.random()*ahouse.getN());
        }
        public int getTotals() {
            return totals;
        }
        public boolean walk(int direction) {
            System.out.println("x="+x+", y="+y+", direction="+direction);
            switch (direction) {
            case UP:
                if(y==0) {
                    return false;
                }else{
                    ahouse.setElement(x,y,ahouse.getElement(x,y)+1);
                    y=y-1;
                }
                return true;
            case DOWN:
                if(y==ahouse.getN()-1){
                    return false;
                }else{
                    ahouse.setElement(x,y,ahouse.getElement(x,y)+1);
                    y=y+1;
                }
                return true;
            case LEFT:
                if(x==0){
                    return false;
                }else{
                    ahouse.setElement(x,y,ahouse.getElement(x,y)+1);
                    x=x-1;
                }
                return true;
            case RIGHT:
                if(x==ahouse.getM()-1){
                    return false;
                }else{
                    ahouse.setElement(x,y,ahouse.getElement(x,y)+1);
                    x=x+1;
                }
                return true;
            default:
                System.out.println("分发移动");return false;
            }
        }
        public void move() {
            int nextdirection;
            boolean success;
            do{
                nextdirection=(int)(Math.random()*4);
                success=walk(nextdirection);
                if(success) totals++;
            }while(ahouse.checkZero());
        }

    }
    public static void main(String[] args){
        House ahouse= new House(6,6);
        Tiaozao atiaozao =ahouse.new Tiaozao(ahouse);
        atiaozao.move();
        ahouse.display();
        System.out.println("Totals="+atiaozao.getTotals());
    }

}