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java随机方向行走代码,java随机方向行走代码是什么
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用JAVA编写二维随机行走问题
public static void main(String[] args) {
// int[] a = new int[]{1,2,3,4};//1 2 3 4 代表上下左右移动
Random r = new Random();
int i = 100;
int[] avgs = new int[4];
Arrays.fill(avgs, 0);//给avgs赋值为0;
for(i = 100;i0;i--){
int walk = r.nextInt(4)+1;
//这里就按得到的walk走
switch (walk) {
case 1:
//上走一步
avgs[0]++;
break;
case 2:
//下走一步
avgs[1]++;
break;
case 3:
//左走一步
avgs[2]++;
break;
case 4:
//右走一步
avgs[3]++;
break;
default:
//错误不走
break;
}
}
for(int j = 0;javgs.length;j++){
System.out.println(j+"方向走了多少步："+avgs[j]+" ");
}
}
相关问答
Q1: java 随机步法？
给你写了一个，没怎么打注释，哪里看不明白再问，望采纳
public class Demo{
char[][] chars = new char[10][10];
int char_x = 0;
int char_y = 0;
public static void main(String[] args){
Demo demo = new Demo();
//System.out.println((int)'A');
for(int i = 66;i91;i++){
demo.go((char)i);
}
demo.print();
}
//填充chars
public Demo(){
for(int i = 0 ; i 10 ; i++){
for(int j = 0 ; j 10 ; j++){
chars[i][j] = '.';
}
}
chars[char_x][char_y]='A';
}
//生成随机方向，并判断是否可以移动
public void go(char c){
int direction;
do{
direction = (int)(Math.random()*4);
switch(direction){
case 0:
if(isOut(char_x+1,char_y)isDot(char_x+1,char_y)){
char_x++;
}else{continue;}
break;
case 1:
if(isOut(char_x-1,char_y)isDot(char_x-1,char_y)){
char_x--;
}else{continue;}
break;
case 2:
if(isOut(char_x,char_y+1)isDot(char_x,char_y+1)){
char_y++;
}else{continue;}
break;
case 3:
if(isOut(char_x,char_y-1)isDot(char_x,char_y-1)){
char_y--;
}else{continue;}
break;
}
break;
}while(true);
chars[char_x][char_y] = c;
}
//判断位置是否在数组内，如果在，返回true
public boolean isOut(int x,int y){
return (x=0 x10 y=0 y10);
}
//判断要移动的位置是否为点，若是，则返回true
public boolean isDot(int x,int y){
return chars[x][y]=='.';
}
public void print(){
for(int i = 0;i10;i++){
for(int j = 0;j10;j++){
System.out.print(chars[i][j]+"\t");
}
System.out.println();
}
}
}
Q2: 在Java游戏中让一个人物走动的代码是什么？
代码主要为以下：
package com.lovo.game.frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import javax.swing.JFrame;
import com.lovo.game.role.Fire;
import com.lovo.game.role.GameMap;
import com.lovo.game.role.ZhaoYun;
import com.lovo.game.util.TrackerInit;
public class GameStartFrame extends JFrame implements Runnable{
private Image memoryImage;
private Graphics memoryGraphics;
public static boolean isRun = true;
private static GameMap gameMap = new GameMap();
private ZhaoYun zy = new ZhaoYun();
private Fire fire = new Fire();
public GameStartFrame(){
this.setSize(900,700);
this.setVisible(true);
this.setDefaultCloseOperation(3);
//设置居中
this.setLocationRelativeTo(null);
//初始化双缓冲画布、画笔
this.memoryImage = this.createImage(900,700);
this.memoryGraphics = this.memoryImage.getGraphics();
//媒体追踪器
MediaTracker tracker = new MediaTracker(this);
TrackerInit.initImage(tracker);
//启动线程
Thread th = new Thread(this);
th.start();
}
public static void main(String[] args) {
GameStartFrame game = new GameStartFrame();
}
public void run() {
while(isRun){
this.flushFrame();
try {
Thread.sleep(20);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
private void flushFrame(){
gameMap.drawMap(memoryGraphics);
zy.drawImage(memoryGraphics);
fire.drawImage(memoryGraphics);
//将双缓冲画布中的图片显示在窗体
this.getGraphics().drawImage(this.memoryImage,0,0,this);
}
}
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
package com.lovo.game.role;
import java.awt.Graphics;
import java.awt.Image;
public class GameMap {
public static Image mapImg;
public static int mapx;
public void drawMap(Graphics memoryGraphics){
mapx -=5;
if(mapx =-17100){
mapx = -17100;
}
memoryGraphics.drawImage(mapImg,mapx,0,null);
}
}
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
package com.lovo.game.role;
import java.awt.Graphics;
import java.awt.Image;
import com.lovo.game.util.MoveImageChange;
public class Fire {
public static Image[]fireImage;
private int x =100;
private int y =300;
private int width = 200;
private int height = 130;
private MoveImageChange moveChange = new MoveImageChange(3);
public void drawImage(Graphics memoryGraphics){
Image img = moveChange.imageChange(fireImage);
memoryGraphics.drawImage(img,this.x,this.y,this.width,this.height,null);
}
}
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
package com.lovo.game.util;
import java.awt.MediaTracker;
import com.lovo.game.role.Fire;
import com.lovo.game.role.GameMap;
import com.lovo.game.role.ZhaoYun;
public class TrackerInit {
public static void initImage(MediaTracker tracker){
//初始化地图图片
GameMap.mapImg = CutImage.getSingleImage("image/map.jpg", tracker);
//赵云
ZhaoYun.zyImage = CutImage.cutOneImage("image/boss/playSpear.png",18, 236, 134,tracker);
//火
Fire.fireImage = CutImage.cutOneImage("image/fireImg.png", 6, 283, 161,tracker);
try {
//0组的图片全部等待加载完毕后，在显示
tracker.waitForID(0);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
package com.lovo.game.util;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.image.CropImageFilter;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageProducer;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
public class CutImage {
public static Image[][] cutManyImage(String filePath, int row, int col,
int imageWidth, int imageHight,MediaTracker tracker) {
Image[][] img = new Image[row][col];
ImageIcon imIcon = new ImageIcon(filePath);// 创建图像数组对象
Image imgTemp = imIcon.getImage();// 创建源图像
// 为源 图象获取ImageProducer源
ImageProducer sourceProducer = imgTemp.getSource();
for (int i = 0; i row; i++) {
for (int j = 0; j col; j++) {
// 创建图片分割图像对象,第一、二个参数为分割图像起始坐标。后两个参数为图像大小
CropImageFilter cropImg = new CropImageFilter(j * imageWidth, i * imageHight,imageWidth, imageHight);
ImageProducer imgProducer = new FilteredImageSource(sourceProducer, cropImg);
img[i][j] = new JFrame().createImage(imgProducer);
tracker.addImage(img[i][j], 0);
}
}
return img;
}
public static Image[] cutOneImage(String filePath,int col,
int imageWidth, int imageHight,MediaTracker tracker) {
Image[] img = new Image[col];
ImageIcon imIcon = new ImageIcon(filePath);// 创建图像数组对象
Image imgTemp = imIcon.getImage();// 创建源图像
// 为源 图象获取ImageProducer源
ImageProducer sourceProducer = imgTemp.getSource();
for (int j = 0; j col; j++) {
// 创建图片分割图像对象,第一、二个参数为分割图像起始坐标。后两个参数为图像大小
CropImageFilter cropImg = new CropImageFilter(j * imageWidth, 0,imageWidth, imageHight);
ImageProducer imgProducer = new FilteredImageSource(sourceProducer, cropImg);
img[j] = new JFrame().createImage(imgProducer);
tracker.addImage(img[j], 0);
}
return img;
}
public static Image getSingleImage(String imgPath,MediaTracker tracker){
Image img = new ImageIcon(imgPath).getImage();
tracker.addImage(img, 0);
return img;
}
}
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
package com.lovo.game.util;
import java.awt.Image;
public class MoveImageChange {
private int count;
private Image img;
private int frequency;
private int loopCount;
public MoveImageChange(int frequency){
this.frequency=frequency;
}
public MoveImageChange(int frequency,int count){
this.frequency=frequency;
this.count = count;
}
public Image imageChange(Image[] images){
if(img==null){//初始图片为第一张图片
img=images[0];
}
count++;
if(countfrequency){//当记数器大于频率时
count=0;
loopCount++;
if(loopCount = images.length){//图片下标越界时
loopCount=0;
}
img=images[loopCount];
}
return img;
}
public void setLoopCount(int loopCount){
this.loopCount = loopCount;
}
}
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
package com.lovo.game.role;
import java.awt.Graphics;
import java.awt.Image;
import com.lovo.game.util.MoveImageChange;
public class ZhaoYun {
public static Image[] zyImage;
private int x =600;
private int y =300;
private int width =200;
private int height =130;
private MoveImageChange moveChange = new MoveImageChange(3);
public void drawImage(Graphics memoryGraphics){
Image img = moveChange.imageChange(zyImage);
memoryGraphics.drawImage(img,this.x,this.y,this.width,this.height,null);
Q3: JAVA 做一个物体移动的方向问题
Math类有很多数学方面的方法
比如
//三角函数
public static double sin(double a)
public static double cos(double a)
public static double tan(double a)
//反三角函数
public static double asin(double a)
public static double acos(double a)
public static double atan(double a)
//弧度、角度转换
public static double toRadians(double angdeg)
public static double toDegrees(double angrad)
由于sin,cos等方法参数都是弧度制，所以先使用toRadians()方法把角度转换成弧度。
比如想获得 sin30°的值
double d=Math.sin(Math.toRadians(30.0));
Q4: java 里如何实现打这样一张图载入后，上下左右控制人物行走呢？
这个叫人物行走方位图吧，一般多用于制作RPG类游戏，比较常见的一种做法是，取坐标：你定义一个矩形，刚好框住一个人，这样就把一个人物动作取出来了，然后控制框的坐标移动，取下一个动作，直到一个动作循环完成！一楼的办法也可以，不过是切重新切图片，比较麻烦，载入的时候，也比较麻烦！
