我似乎无法在 if 命令中更改纹理以进行按键操作。我有一种感觉，这更像是一个公共/私有变量的事情。
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyAdapter;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
public class main extends JFrame {
public String w =("C:/users/John/workspace/Gamebasics/src/untitled.png");
int x, y, xDirection, yDirection;
private Image dbImage;
private Graphics dbg;
Image face;
int x1, y1;
public void move(){
x += xDirection;
y += yDirection;
}
public void setXDir(int xdir){
xDirection = xdir;
}
public class AL extends KeyAdapter {
public void keyPressed(KeyEvent e){
int keyCode = e.getKeyCode();
if(keyCode == e.VK_LEFT){
w = ("C:/users/John/workspace/Gamebasics/src/left.png");
if(x <= 5)
x = 5;
if(y >= 225 && y <=400 && x >= 225 && x <= 315)
x = 315;
x-= +4;
}
if(keyCode == e.VK_UP){
w = ("C:/users/John/workspace/Gamebasics/src/up.png");
if(y <= 28)
y = 28;
if(y >= 370 && y <=405 && x >= 225 && x <= 310)
y = 405;
y-= +4;
}
if(keyCode == e.VK_DOWN){
w = ("C:/users/John/workspace/Gamebasics/src/down.png");
if(y >= 470)
y = 470;
if(y <= 370 && y >=220 && x >= 225 && x <= 310)
y = 220;
y+= +4;
}
if(keyCode == e.VK_RIGHT){
w = ("C:/users/John/workspace/Gamebasics/src/right.png");
if(x >= 470)
x = 470;
if(y >= 225 && y <=400 && x >= 220 && x <= 315)
x = 220;
x+= +4;
}
}
}
public main(){
ImageIcon i = new ImageIcon(w);
face = i.getImage();
addKeyListener(new AL());
setTitle("Retarded Rectangle Game");
setSize(500, 500);
setResizable(false);
setVisible(true);
setBackground(Color.RED);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
x = 340;
y = 360;
x1 = 250;
y1 = 250;
}
public void paint(Graphics g){
dbImage = createImage(getWidth(), getHeight());
dbg = dbImage.getGraphics();
paintComponent(dbg);
g.drawImage(dbImage, 0, 0, this);
g.setColor(Color.CYAN);
g.fillRect(250, 250, 60, 150);
repaint();
}
public void paintComponent (Graphics g){
g.setColor(Color.CYAN);
g.fillRect(250, 250, 60, 150);
repaint();
g.drawImage(face, x, y, this);
repaint();
}
public static void main(String[] args){
new main();
}
}