我想知道是否有人可以告诉我这里我做错了什么。我在java编写基本游戏，我想在开头添加标题屏幕。基本上，如果玩家点击“1”，我希望游戏开始。但是，当我尝试更改图形时，屏幕是空白的，但游戏的键仍然有效，游戏肯定会自行更新。它只是没有显示任何东西。这是文件。非常感谢任何帮助！
FarthornWindow.java：
package com.Farthorn.game;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferStrategy;
import javax.swing.JFrame;
public class FarthornWindow extends Canvas
{
private static final long serialVersionUID = 2297047193030106579L;
private JFrame frame;
private TitleScreen ts;
public FarthornWindow(int width, int height)
{
ts = new TitleScreen(this);
frame = new JFrame("Farthorn - Kos");
frame.setSize(width, height);
frame.setResizable(false);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(ts);
frame.setVisible(true);
ts.start();
}
public JFrame getFrame()
{
return frame;
}
}
TitleScreen.java：
package com.Farthorn.game;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferStrategy;
public class TitleScreen extends Canvas implements Runnable
{
FarthornWindow window;
private boolean running = false;
private Thread thread;
private BufferStrategy bs;
public TitleScreen(FarthornWindow window)
{
this.window = window;
this.addKeyListener(new MenuInput(this));
}
public synchronized void start()
{
running = true;
thread = new Thread(this);
thread.start();
}
public synchronized void stop()
{
try
{
thread.join();
running = false;
}
catch(Exception e)
{
e.printStackTrace();
}
}
public void run()
{
this.requestFocus();
long lastTime = System.nanoTime();
double amountOfTicks = 60.0;
double ns = 1000000000 / amountOfTicks;
double delta = 0;
long timer = System.currentTimeMillis();
int frames = 0;
while (running)
{
long now = System.nanoTime();
delta += (now - lastTime) / ns;
lastTime = now;
while (delta >= 1)
{
tick();
delta--;
}
if (running)
{
render();
}
frames++;
if(System.currentTimeMillis() - timer > 1000)
{
timer += 1000;
System.out.println("FPS1 " + frames);
frames = 0;
}
}
stop();
}
private void tick()
{
}
private void render()
{
bs = this.getBufferStrategy();
if (bs == null)
{
this.createBufferStrategy(3);
return;
}
Graphics g = bs.getDrawGraphics();
g.setColor(Color.red);
g.fillRect(0, 0, Game.WIDTH, Game.HEIGHT);
g.dispose();
bs.show();
}
public FarthornWindow getWindow()
{
return window;
}
public void setRunning(boolean r)
{
running = r;
}
}
Game.java：
package com.Farthorn.game;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferStrategy;
import javax.swing.ImageIcon;
public class Game extends Canvas implements Runnable
{
private static final long serialVersionUID = -4431078110090264106L;
public final static int WIDTH = 640;
public final static int HEIGHT = WIDTH / 12 * 9;
private Thread thread;
private boolean running = false;
private CharacterHandler cHandler;
private ObjectHandler oHandler;
public int change = 0;
private static String mapBackgroundTop = "/Users/myName/Desktop/FarthornPics/background_top.png";
private static String mapBackgroundBottom = "/Users/myName/Desktop/FarthornPics/background_bottom.png";
private static String plant1 = "/Users/myName/Desktop/FarthornPics/PlantEnemy1.png";
private static String animal1 = "/Users/myName/Desktop/FarthornPics/DumbEnemy1Still.png";
private Image backgroundTop;
private Image backgroundBottom;
private int baseheight = HEIGHT/2+64;
public Game()
{
ImageIcon i = new ImageIcon(mapBackgroundTop);
backgroundTop = i.getImage();
i = new ImageIcon(mapBackgroundBottom);
backgroundBottom = i.getImage();
cHandler = new CharacterHandler();
oHandler = new ObjectHandler();
Player p1 = new Player(ID.Player, WIDTH/2-32, HEIGHT/2, oHandler, cHandler);
cHandler.addCharacter(p1);
/*
cHandler.addCharacter(new PlantEnemy(ID.PlantEnemy, WIDTH+180, HEIGHT/2+104, p1, plant1));
cHandler.addCharacter(new PlantEnemy(ID.PlantEnemy, WIDTH+195, HEIGHT/2+104, p1, plant1));
cHandler.addCharacter(new PlantEnemy(ID.PlantEnemy, WIDTH+210, HEIGHT/2+104, p1, plant1));
cHandler.addCharacter(new PlantEnemy(ID.PlantEnemy, WIDTH+225, HEIGHT/2+104, p1, plant1));
cHandler.addCharacter(new PlantEnemy(ID.PlantEnemy, WIDTH+240, HEIGHT/2+104, p1, plant1));
cHandler.addCharacter(new PlantEnemy(ID.PlantEnemy, WIDTH+255, HEIGHT/2+104, p1, plant1));
cHandler.addCharacter(new PlantEnemy(ID.PlantEnemy, WIDTH+270, HEIGHT/2+104, p1, plant1));
cHandler.addCharacter(new PlantEnemy(ID.PlantEnemy, WIDTH+285, HEIGHT/2+104, p1, plant1));
cHandler.addCharacter(new PlantEnemy(ID.PlantEnemy, WIDTH+300, HEIGHT/2+104, p1, plant1));
cHandler.addCharacter(new PlantEnemy(ID.PlantEnemy, WIDTH+315, HEIGHT/2+104, p1, plant1));
*/
cHandler.addCharacter(new DumbEnemy(ID.DumbEnemy, (int)2*WIDTH, HEIGHT/2+104, p1, animal1));
oHandler.addObject(new HUD(ID.HUD, 10, 10, cHandler));
oHandler.addObject(new Platform(ID.Platform, -100, Game.HEIGHT/2+124, 2400, 1, (Player) cHandler.characters.get(0)));
oHandler.addObject(new Platform(ID.Platform, 2*WIDTH, baseheight+20, 100, 1, (Player) cHandler.characters.get(0)));
this.addKeyListener(new KeyInput((Player) cHandler.characters.get(0)));
this.addMouseListener(new MouseInput(((Player) cHandler.characters.get(0))));
// FarthornWindow window = new FarthornWindow(WIDTH, HEIGHT, this);
}
public synchronized void start()
{
running = true;
thread = new Thread(this);
thread.start();
}
public synchronized void stop()
{
try
{
thread.join();
running = false;
}
catch(Exception e)
{
e.printStackTrace();
}
}
public void run()
{
this.requestFocus();
long lastTime = System.nanoTime();
double amountOfTicks = 60.0;
double ns = 1000000000 / amountOfTicks;
double delta = 0;
long timer = System.currentTimeMillis();
int frames = 0;
while (running)
{
long now = System.nanoTime();
delta += (now - lastTime) / ns;
lastTime = now;
while (delta >= 1)
{
tick();
delta--;
}
if (running)
{
render();
}
frames++;
if(System.currentTimeMillis() - timer > 1000)
{
timer += 1000;
System.out.println("FPS " + frames);
frames = 0;
}
}
stop();
}
private void tick()
{
int deltaX = 0;
int afterX = 0;
deltaX = cHandler.characters.get(0).getX();
oHandler.tick();
cHandler.tick();
deltaX = cHandler.characters.get(0).getX();
if (deltaX != afterX)
change = (afterX-deltaX);
else
change = 0;
}
private void render()
{
BufferStrategy bs = this.getBufferStrategy();
if (bs == null)
{
this.createBufferStrategy(3);
return;
}
Graphics g = bs.getDrawGraphics();
g.drawImage(backgroundTop, 0+change, 0, null);
g.drawImage(backgroundBottom, 0+change, 364, null);
g.setColor(Color.blue);
g.fillRect(0, 0, WIDTH, HEIGHT);
oHandler.render(g);
cHandler.render(g);
g.dispose();
bs.show();
}
public int getChange()
{
return change;
}
public static int clamp(int var, int min, int max)
{
if (var >= max)
{
return var = max;
}
else if (var <= min){
return var = min;
}
else
return var;
}
public static boolean isSolid(Player player, ObjectHandler oHandler)
{
for (int i = 0; i < oHandler.objects.size(); i++)
{
GameObject temp = oHandler.objects.get(i);
if (temp.getId() == ID.Platform)
{
if (((Platform) temp).getRect().intersects(player.getFeet()))
{
player.setVelY(0);
return true;
}
}
}
return false;
}
}
MenuInput.java：
package com.Farthorn.game;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
public class MenuInput extends KeyAdapter
{
private TitleScreen ts;
public MenuInput(TitleScreen ts)
{
this.ts = ts;
}
public void keyPressed(KeyEvent e)
{
int key = e.getKeyCode();
if (key == KeyEvent.VK_1)
{
ts.setRunning(false);
ts.getWindow().getFrame().remove(ts);
Game game = new Game();
ts.getWindow().getFrame().add(game);
game.start();
}
}
}
KeyInput.java：
package com.Farthorn.game;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
public class KeyInput extends KeyAdapter
{
private boolean[] pressed = new boolean[4];
private Player player;
public KeyInput(Player player)
{
this.player = player;
for (int i = 0; i < pressed.length; i++)
pressed[i] = false;
}
public class jumpThread implements Runnable
{
long jumpingTime = 200;
public void run() {
try
{
player.setVelY(-5);
Thread.sleep(jumpingTime);
jumpingTime = 150;
player.setVelY(-3);
Thread.sleep(jumpingTime);
jumpingTime = 50;
player.setVelY(-2);
Thread.sleep(jumpingTime);
player.setLanding(true);
Thread.sleep(500);
}
catch (Exception e)
{
e.printStackTrace();
new Thread(this).start();
}
}
}
public class walkThread implements Runnable
{
long walkingTime = 200;
public void run()
{
try {
while (player.getWalking() == true)
{
player.setCharImage("/Users/myName/Desktop/FarthornPics/charWalking1.png");
Thread.sleep(walkingTime);
player.setCharImage("/Users/myName/Desktop/FarthornPics/charWalking2.png");
Thread.sleep(walkingTime);
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
public void keyPressed(KeyEvent e)
{
int key = e.getKeyCode();
if (key == KeyEvent.VK_ESCAPE){
System.exit(0);
}
if (player.getID() == ID.Player)
{
if (key == KeyEvent.VK_A)
{
player.setWalking(true);
new Thread(new walkThread()).start();
player.setVelX(-5);
pressed[0] = true;
}
if (key == KeyEvent.VK_D)
{
new Thread(new walkThread()).start();
player.setVelX(5);
pressed[1] = true;
player.setWalking(true);
}
if (key == KeyEvent.VK_W)
{
new Thread(new jumpThread()).start();
pressed[2] = true;
}
}
}
public void keyReleased(KeyEvent e)
{
int key = e.getKeyCode();
if (key == KeyEvent.VK_A)
{
pressed[0] = false;
}
if (key == KeyEvent.VK_D)
{
pressed[1] = false;
}
if (!pressed[0] && !pressed[1])
{
player.setWalking(false);
player.setVelX(0);
}
}
}
RunMethod.java：
package com.Farthorn.game;
public class RunMethod {
public static void main(String[] args)
{
new FarthornWindow(Game.WIDTH, Game.HEIGHT);
}
}