java设定物体运动边界 代码

你这个x,y是在方法内部定义的一个变量 没有赋值就使用当然编译不通过咯

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要想使用必须要先实例化。、

代码具体要怎么写 要看你的业务逻辑！

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);

java控制红绿灯及模拟车辆运动

写两个程序分别模拟红绿灯和汽车：

1）红绿灯程序以报文形式通知汽车程序；

2）汽车程序需要用多线程来实现。

3）红绿灯程序用个循环，每隔n分钟红绿灯转换，同时通知汽车程序；