使用缓冲图像渲染精灵

Question

我正在尝试使用缓冲图像从精灵表渲染精灵，但我无法弄清楚为什么我的代码无法正常工作，即使我从类中调用图像？

代码：

package com.game.src.main;

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JFrame;

public class Game extends Canvas implements Runnable {

    private BufferedImage spriteSheet = null;
    boolean sprite = false;
    private BufferedImage sprite;

    public void init(){
        BufferedImageLoader loader = new BufferedImageLoader();
        try{

            spriteSheet = loader.loadImage("/astronaut_sprite1.png");
        }catch(IOException e){
            e.printStackTrace();
        }
}

    private void render(){
        BufferStrategy bs = this.getBufferStrategy();
        if(bs == null){
            createBufferStrategy(3);
            return;

        }

        if(sprite == true){
            g.drawImage(sprite, 0, 0, getWidth(), getHeight(), this);
            System.out.println("True");
        }

        g.dispose();
        bs.show();
}

    public void keyPressed(KeyEvent e){
        int key = e.getKeyCode();

        if(key == KeyEvent.VK_1){
            sprite = true;
        }

}

    public static void main(String args[]){
        Game game = new Game();

    public BufferedImage getSpriteSheet(){
        return spriteSheet;
    }



}

我正在调用的类（精灵）是：

package com.game.src.main;

import java.awt.Graphics;
import java.awt.image.BufferedImage;

public class sprite{

    private double x;
    private double y;

    private BufferedImage sprite;

    public sprite(x, y, Game game){

        SpriteSheet ss = new SpriteSheet(game.getSpriteSheet());

        sprite = ss.grabImage(3, 3, 32, 32);
    }

缓冲图像加载器：

package com.game.src.main;

import java.awt.image.BufferedImage;
import java.io.IOException;

import javax.imageio.ImageIO;

public class BufferedImageLoader {

    private BufferedImage image;

    public BufferedImage loadImage(String path) throws IOException{

        image = ImageIO.read(getClass().getResourceAsStream(path));
        return image;

    }

}

Answer 1

使用ImageIO.read(new File("/astronaut_sprite1.png")); 代替spriteSheet = loader.loadImage("/astronaut_sprite1.png");

您的文件夹结构：

-src
--com
---m14x
----game
-----BufferedImageLoader.java
-----Game.java
-----SpriteSheet.java
-res
---sprite_sheet.png

您的 BufferedImageLoader 类：

    public class BufferedImageLoader {
        private BufferedImage image;

        public BufferedImage loadImage(String path) throws IOException{
            System.out.println("PATH = " + path);
            File file = new File(path);

            if (file.exists()) {
                // First, make sure the path exists
System.out.println("File exists!");

            }
            if (file.isDirectory()) {
                // This will tell you if it is a directory
 System.out.println("File is a directory!");

            }
            if (file.isFile()) {
                // Similarly, this will tell you if it's a file
System.out.println("File has a path!");

            }
            System.out.println("Trying to load image:");
            image = ImageIO.read(new File(path));

            //image = ImageIO.read(getClass().getResource(path));

            System.out.println("Image path found. Returning...");
            return image;


        }

    }