我真的很需要一些关于我正在制作的游戏的帮助。我已经尝试了很长时间，但解决方案却无法解决。目前它的作用并不大。基本上，我需要鼠标监听器来查找左键单击并以一种方式更改蛇的方向，而另一种方式则用于右键单击。但我似乎无法正确设置监听器。如果我的编码很差，或者如果我正在做的事情有更好的解决方案，请原谅，我已经编码了那么久了。
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Graphics;
import java.awt.*;
import java.awt.Color;
import java.util.*;
import java.awt.event.*;
public class SnakeGame implements MouseListener{
static int delta = 10;
public static void main(String[] args) {
JFrame f = new JFrame("Snake Game"){
@Override
public void paint(Graphics g){
ArrayList<Integer> snakeX = new ArrayList<Integer>();
ArrayList<Integer> snakeY = new ArrayList<Integer>();
ArrayList<Integer> food = new ArrayList<Integer>();
char direction = 'e';
int tail = 2;
int foodX;
int foodY;
boolean game = true;
boolean check = false;
boolean recheck = true;
snakeX.add(0,20);
snakeX.add(1,10);
snakeX.add(2,0);
snakeY.add(0,0);
snakeY.add(1,0);
snakeY.add(2,0);
Random rnd = new Random();
do{
foodX = (rnd.nextInt(750/delta)+1) * delta;
foodY = (rnd.nextInt(750/delta)+1) * delta;
//System.out.println(foodX + " : " + foodY);
for(int i = 0; i < snakeX.size(); i++){
if(recheck){
if(foodX != snakeX.get(i).intValue() && foodY != snakeY.get(i).intValue()){
check = true;
recheck = false;
}
else{
check = false;
recheck = true;
}
}
}
}while(!check);
food.add(0, foodX);
food.add(1, foodY);
while (game){
g.fillRect(0,0,759,781);
drawSnake(snakeX, snakeY, food, g);
moveSnake(snakeX, snakeY, direction, game, food, g);
drawFood(food, g);
for(long delay = 0; delay < 75000000; delay++);
}
}
};
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(768,790);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public void mousePressed(MouseEvent e){
}
public void mouseEntered(MouseEvent e){
}
public void mouseReleased(MouseEvent e){
}
public void mouseClicked(MouseEvent e){
}
public void mouseExited(MouseEvent e){
}
public static void drawFood(ArrayList<Integer> food, Graphics g){
g.setColor(Color.red);
g.fillRect(food.get(0).intValue()+9, food.get(1).intValue()+31, delta, delta);
}
public static void drawSnake(ArrayList<Integer> snakeX, ArrayList<Integer> snakeY, ArrayList<Integer> food, Graphics g){
g.setColor(Color.black);
g.fillRect(0,0,760,782);
drawFood(food, g);
g.setColor(Color.white);
for(int i = 0; i < snakeX.size(); i++){
g.fillRect(snakeX.get(i)+9, (int) snakeY.get(i)+31, delta, delta);
}
}
public static void checkContact(ArrayList<Integer> snakeX, ArrayList<Integer> snakeY, Boolean game){
for(int i = 1; i < snakeX.size(); i++){
if(snakeX.get(i) == snakeX.get(0) && snakeY.get(i) == snakeY.get(0))
game = false;
}
}
public static void checkFood(ArrayList<Integer> snakeX, ArrayList<Integer> snakeY, ArrayList<Integer> food, Graphics g){
if(snakeX.get(0).intValue() == food.get(0).intValue() && snakeY.get(0).intValue() == food.get(1).intValue()){
setFood(food, snakeX, snakeY);
snakeX.add(snakeX.get(snakeX.size()-1).intValue()-delta);
snakeY.add(snakeY.get(snakeY.size()-1).intValue()-delta);
}
}
public static void setFood(ArrayList<Integer> food, ArrayList<Integer> snakeX, ArrayList<Integer> snakeY){
boolean check = false;
boolean recheck = true;
Random rnd = new Random();
int foodX;
int foodY;
do{
foodX = (rnd.nextInt(750/delta)+1) * delta;
foodY = (rnd.nextInt(750/delta)+1) * delta;
//System.out.println(foodX + " : " + foodY);
for(int i = 0; i < snakeX.size(); i++){
if(recheck){
if(foodX != snakeX.get(i).intValue() && foodY != snakeY.get(i).intValue()){
check = true;
recheck = false;
}
else{
check = false;
recheck = true;
}
}
}
}while(!check);
food.set(0, foodX);
food.set(1, foodY);
}
public static void moveSnake(ArrayList<Integer> snakeX, ArrayList<Integer> snakeY, char direction, Boolean game, ArrayList<Integer> food, Graphics g){
if(snakeX.get(0).intValue() < 740 && snakeX.get(0).intValue() >= 0 && snakeY.get(0).intValue() < 740 && snakeY.get(0).intValue() >= 0){
if(direction == 'e'){
int temp = snakeX.get(0).intValue();
int temp2 = 0;
snakeX.set(0, temp+delta);
for(int i = 1; i < snakeX.size(); i++){
temp2 = snakeX.get(i);
snakeX.set(i,temp);
temp = temp2;
}
int tempY = snakeY.get(0).intValue();
int tempY2 = 0;
snakeY.set(0, tempY);
for(int i = 1; i < snakeY.size(); i++){
tempY2 = snakeY.get(i);
snakeY.set(i,tempY);
tempY = tempY2;
}
}
else if(direction == 'n'){
int temp = snakeX.get(0).intValue();
int temp2 = 0;
snakeX.set(0, temp);
for(int i = 1; i < snakeX.size(); i++){
temp2 = snakeX.get(i);
snakeX.set(i,temp);
temp = temp2;
}
int tempY = snakeY.get(0).intValue();
int tempY2 = 0;
snakeY.set(0, tempY+delta);
for(int i = 1; i < snakeY.size(); i++){
tempY2 = snakeY.get(i);
snakeY.set(i,tempY);
tempY = tempY2;
}
}
else if(direction == 'w'){
int temp = snakeX.get(0).intValue();
int temp2 = 0;
snakeX.set(0, temp-delta);
for(int i = 1; i < snakeX.size(); i++){
temp2 = snakeX.get(i);
snakeX.set(i,temp);
temp = temp2;
}
int tempY = snakeY.get(0).intValue();
int tempY2 = 0;
snakeY.set(0, tempY);
for(int i = 1; i < snakeY.size(); i++){
tempY2 = snakeY.get(i);
snakeY.set(i,tempY);
tempY = tempY2;
}
}
else if(direction == 's'){
int temp = snakeX.get(0).intValue();
int temp2 = 0;
snakeX.set(0, temp);
for(int i = 1; i < snakeX.size(); i++){
temp2 = snakeX.get(i);
snakeX.set(i,temp);
temp = temp2;
}
int tempY = snakeY.get(0).intValue();
int tempY2 = 0;
snakeY.set(0, tempY-delta);
for(int i = 1; i < snakeY.size(); i++){
tempY2 = snakeY.get(i);
snakeY.set(i,tempY);
tempY = tempY2;
}
}
checkFood(snakeX, snakeY, food, g);
checkContact(snakeX, snakeY, game);
}
drawSnake(snakeX, snakeY, food, g);
}
}
最佳答案
您的游戏循环(代码中表示 while(game) 的部分)应该一直运行到游戏结束，但有点错位。因为该循环故意是无限的，所以它永远不会到达它之后为帧设置值的行。这些陈述:
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(768,790);
f.setLocationRelativeTo(null);
f.setVisible(true);
需要放在循环之前。然后，要正确注册框架的鼠标监听器，您必须将其添加到框架中，如下所示:
f.addMouseListener(this);
这之所以有效，是因为 SnakeGame 可以被视为 MouseListener，因为它实现了该接口(interface)。
额外提示: 暂停执行的正确方法是使用 Swing 计时器，而不是多次运行 for 循环。
阅读this有关使用计时器的更多信息。 希望有帮助!
关于java - MouseListener 的问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22264211/